Date: Thu, 26 Nov 15 01:20:12 GMT Subject: physics daily 18 new + 16 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: physics@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Tue 24 Nov 15 21:00:00 GMT to Wed 25 Nov 15 21:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1511.07883 Date: Tue, 24 Nov 2015 21:01:01 GMT (3858kb,D) Title: Machine Learning Exciton Dynamics Authors: Florian H\"ase, St\'ephanie Valleau, Edward Pyzer-Knapp and Al\'an Aspuru-Guzik Categories: physics.chem-ph physics.comp-ph \\ Obtaining the exciton dynamics of large photosynthetic complexes by using mixed quantum mechanics/molecular mechanics (QM/MM) is computationally demanding. We propose a machine learning technique, multi-layer perceptrons, as a tool to reduce the time required to compute excited state energies. With this approach we predict time-dependent density functional theory (TDDFT) excited state energies of bacteriochlorophylls in the Fenna-Matthews-Olson (FMO) complex. Additionally we compute spectral densities and exciton populations from the predictions. Different methods to determine multi-layer perceptron training sets are introduced, leading to several initial data selections. In addition, we compute spectral densities and exciton populations. Once multi-layer perceptrons are trained, predicting excited state energies was found to be significantly faster than the corresponding QM/MM calculations. We showed that multi-layer perceptrons can successfully reproduce the energies of QM/MM calculations to a high degree of accuracy with prediction errors contained within 0.01 eV (0.5%). Spectral densities and exciton dynamics are also in agreement with the TDDFT results. The acceleration and accurate prediction of dynamics strongly encourage the combination of machine learning techniques with ab-initio methods. \\ ( http://arxiv.org/abs/1511.07883 , 3858kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07893 Date: Tue, 24 Nov 2015 21:36:40 GMT (170kb,D) Title: Numerical Investigation of Metrics for Epidemic Processes on Graphs Authors: Max Goering, Faryad Darabi Sahneh, Nathan Albin, Caterina Scoglio, Pietro Poggi-Corradini Categories: physics.soc-ph cs.SI Comments: 6 pages, 1 figure, 3 tables, In Proceedings of 2015 Asilomar Conference on Signals, Systems, and Computers \\ This study develops the epidemic hitting time (EHT) metric on graphs measuring the expected time an epidemic starting at node $a$ in a fully susceptible network takes to propagate and reach node $b$. An associated EHT centrality measure is then compared to degree, betweenness, spectral, and effective resistance centrality measures through exhaustive numerical simulations on several real-world network data-sets. We find two surprising observations: first, EHT centrality is highly correlated with effective resistance centrality; second, the EHT centrality measure is much more delocalized compared to degree and spectral centrality, highlighting the role of peripheral nodes in epidemic spreading on graphs. \\ ( http://arxiv.org/abs/1511.07893 , 170kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07913 Date: Tue, 24 Nov 2015 23:10:38 GMT (826kb) Title: R&D on GEM Detectors for Forward Tracking at a Future Electron-Ion Collider Authors: Aiwu Zhang, Vallary Bohpatkar, Marcus Hohlmann, Xinzhan Bai, Kondo Gnanvo, Nilanga K. Liyanage, Matt Posik, Bernd Surrow Categories: physics.ins-det hep-ex nucl-ex Comments: 4 pages, 8 figures, submitted to Proc. 2015 IEEE Nucl. Sci. Symposium, San Diego, CA \\ We report the status of R&D on large triple-GEM detectors for a forward tracker (FT) in an experiment at a future Electron Ion Collider (EIC) that will improve our understanding of QCD. We have designed a detector prototype specifically targeted for the EIC-FT, which has a trapezoidal shape with 30.1 degrees opening angle. We are investigating different detector assembly techniques and signal readout technologies, but have designed a common GEM foil to minimize NRE cost for foil production. The assembly techniques comprise either a purely mechanical method including foil stretching as pioneered by CMS but with certain modifications, or gluing foils to frames that are then assembled mechanically, or gluing foils to frames that are then glued together. The first two assembly techniques allow for re-opening chambers so that a GEM foil can be replaced if it is damaged. For readout technologies, we are pursuing a cost-effective one-dimensional readout with wide zigzag strips that maintains reasonable spatial resolution, as well two-dimensional readouts - one with stereo-angle (u-v) strips and another with r-phi strips. In addition, we aim at an overall low-mass detector design to facilitate good energy resolution for electrons scattered at low momenta. We present design for GEM foils and other detector parts, which we plan to entirely acquire from U.S. companies. \\ ( http://arxiv.org/abs/1511.07913 , 826kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07941 Date: Wed, 25 Nov 2015 03:12:04 GMT (33kb) Title: Two-timing Hypothesis, Distinguished Limits, Drifts, and Vibrodiffusion for Oscillating Flows Authors: Vladimir A Vladimirov Categories: physics.flu-dyn physics.plasm-ph Comments: arXiv admin note: substantial text overlap with arXiv:1509.01006 MSC-class: 76A02, 76M45, 76M99, 76M50, 76R99 \\ In this paper we develop and use the two-timing method for a systematic study of a scalar advection caused by a general oscillating velocity field. Mathematically, we study and classify the multiplicity of distinguished limits and asymptotic solutions produced in the two-timing framework. Our calculations go far beyond the usual ones, performed by the two-timing method. We do not use any additional assumptions, hence our study can be seen as a test for the validity and sufficiency of the two-timing hypothesis. Physically, we derive the averaged equations in their maximum generality (and up to high orders in small parameters) and obtain qualitatively new results. Our results are: (i) the dimensionless advection equation contains \emph{two independent dimensionless small parameters}: the ratio of two time-scales and the spatial amplitudes of oscillations; (ii) we identify a sequence of \emph{distinguished limit solutions} which correspond to the successive degenerations of a \emph{drift velocity}; (iii) for a general oscillating velocity field we derive the averaged equations for the first \emph{four distinguished limit solutions}; (iv) we show, that \emph{each distinguish limit solution} produces an infinite number of \emph{parametric solutions} with a Strouhal number as the only large parameter; those solutions differ from each other by the slow time-scale and the velocity amplitude; (v) the striking outcome of our calculations is the inevitable appearance of \emph{vibrodiffusion}, which represents a Lie derivative of the averaged tensor of quadratic displacements; (vi) our main methodological result is the introduction of a logical order/classification of the solutions; we hope that it opens the gate for applications of the same ideas to more complex systems; (vii) five types of oscillating flows are presented as examples of different drifts and vibrodiffusion. \\ ( http://arxiv.org/abs/1511.07941 , 33kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07964 Date: Wed, 25 Nov 2015 06:15:49 GMT (1174kb) Title: A bandgap phenomenon in non-periodic plasmonic waveguides Authors: Viacheslav Shaidiuk, Sergey Menabde and Namkyoo Park Categories: physics.optics \\ The phenomenon of a dispersion bandgap opening between low-loss spectral windows of odd and even plasmonic modes in a layered insulator-metal-insulator plasmonic waveguide is introduced. Beginning with a three layer plasmonic dispersion relation, we explain and numerically confirm the existence of the plasmonic bandgap, and investigate its properties at a very broad spectrum range from ultraviolet to far infrared. The nature of the observed bandgap opening is explained in terms of the near-zero value of an effective permittivity for plasmonic modes in the waveguide. The adjustment of the plasmonic bandgap spectrum is demonstrated with the structural modification of the plasmonic waveguide. As an application example, we illustrate a new concept of coupling control between surface plasmons and free-space excitation waves, by employing a tapered non-adiabatic insulator-metal-insulator waveguide. \\ ( http://arxiv.org/abs/1511.07964 , 1174kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07968 Date: Wed, 25 Nov 2015 06:43:35 GMT (1162kb) Title: Direct Optical Probing of Transverse Electric Mode in Graphene Authors: Sergey Menabde, Daniel Mason, Evgeny Kornev, Changhee Lee and Namkyoo Park Categories: physics.optics cond-mat.other \\ Unique electrodynamic response of graphene implies a manifestation of an unusual propagating and localised transverse-electric (TE) mode near the spectral onset of interband transitions. However, excitation and further detection of the TE mode supported by graphene is considered to be a challenge for it is extremely sensitive to excitation environment and phase matching condition adherence. Here for the first time, we experimentally prove an existence of the TE mode by its direct optical probing, demonstrating significant coupling to an incident wave in electrically doped multilayer graphene sheet at room temperature. We believe that proposed technique of careful phase matching and obtained access to graphene TE excitation would stimulate further studies of this unique phenomenon, and enable its potential employing in various fields of photonics as well as for characterization of graphene. \\ ( http://arxiv.org/abs/1511.07968 , 1162kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07976 Date: Wed, 25 Nov 2015 07:28:35 GMT (72kb) Title: Collisional-Radiative Model for the visible spectrum of $W^{26+}$ ions Authors: Xiaobin Ding, Jiaxin Liu, Fumihiro Koike, Izumi Murakami, Daiji Kato, Hiroyuki A Sakaue, Nobuyuki Nakamura, Chenzhong Dong Categories: physics.atom-ph \\ Plasma diagnostics in magnetic confinement fusion plasmas by using visible spectrum strongly depends on the knowledge of fundamental atomic properties. A detailed collisional-radiative model of W$^{26+}$ ions has been constructed by considering radiative and electron excitation processes, in which the necessary atomic data had been calculated by relativistic configuration interaction method with the implementation of Flexible Atomic Code. The visible spectrum observed at an electron beam ion trap (EBIT) in Shanghai in the range of 332 nm to 392 nm was reproduced by present calculations. Some transition pairs of which the intensity ratio are sensitive to the electron density were selected as potential candidate of plasma diagnostics. Their electron density dependence are theoretically evaluated for the cases of EBIT plasmas and magnetic confinement fusion plasmas. \\ ( http://arxiv.org/abs/1511.07976 , 72kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07980 Date: Wed, 25 Nov 2015 07:45:45 GMT (100kb) Title: Singly excited S-states of compressed two-electron ions Authors: J. K. Saha, S. Bhattacharyya, T. K. Mukherjee Categories: physics.atom-ph Comments: 25 pages, 7 figures \\ A detailed analysis on the effect of spherical impenetrable confinement on the structural properties of two-electron ions in S-states have been done. The energy values of 1sns [n = 2-4] (3Se) states of helium-like ions (Z = 2-5) are estimated within the framework of Ritz variational method by using explicitly correlated Hylleraas-type basis sets. The correlated wave functions used here are consistent with the finite boundary conditions due to spherical confinement. A comparative study between the singlet and triplet states originating from a particular electronic configuration shows incidental degeneracy and the subsequent level-crossing phenomena. The thermodynamic pressure felt by the ion inside the sphere pushes the energy levels towards continuum. Critical pressures for the transition to strong confinement regime (where the singly excited two-electron energy levels cross the corresponding one-electron threshold) as well as for the complete destabilization are also estimated. \\ ( http://arxiv.org/abs/1511.07980 , 100kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08005 Date: Wed, 25 Nov 2015 09:51:21 GMT (4774kb) Title: Three-dimensional magnetic cloak working from DC to 250 kHz Authors: Jianfei Zhu, Wei Jiang, Yichao Liu, Ge Yin, Jun Yuan, Sailing He, and Yungui Ma Categories: physics.optics Comments: 16 pages and 5 figures Journal-ref: Nature Communications 6:8931 (2015) DOI: 10.1038/ncomms9931 \\ Invisible cloaking is one of major outcomes of the metamaterial research, but the practical potential, in particular for high frequencies (e.g., microwave to visible light), is fatally challenged by the complex material properties they usually demand. On the other hand, it will be advantageous and also technologically instrumental to design cloaking devices for applications at low frequencies where electromagnetic components are favorably uncoupled. In this work, we vastly develop the bilayer approach to create a three-dimensional magnetic cloak able to work in both static and dynamic fields. Under the quasi-static approximation, we demonstrate a perfect magnetic cloaking device with a large frequency band from zero to 250 kHz. The practical potential of our device is experimentally verified by using a commercial metal detector, which may lead us to having a real cloaking application where the dynamic magnetic field can be manipulated in desired ways. \\ ( http://arxiv.org/abs/1511.08005 , 4774kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08031 Date: Wed, 25 Nov 2015 12:16:25 GMT (2593kb) Title: Curvature-induced dissipation Authors: J.-D. Debus, M. Mendoza, S. Succi, H. J. Herrmann Categories: physics.flu-dyn \\ By inspecting the effect of curvature on a moving fluid, we find that local sources of curvature not only exert inertial forces on the flow, but also generate viscous stresses as a result of the departure of streamlines from the idealized geodesic motion. The curvature-induced viscous forces are shown to cause an indirect and yet appreciable energy dissipation. As a consequence, the flow converges to a stationary equilibrium state solely by virtue of curvature-induced dissipation. In addition, we show that flow through randomly-curved media satisfies a non-linear transport law, resembling Darcy-Forchheimer's law, due to the viscous forces generated by the spatial curvature. It is further shown that the permeability can be characterized in terms of the average metric perturbation. \\ ( http://arxiv.org/abs/1511.08031 , 2593kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08103 Date: Wed, 25 Nov 2015 16:04:59 GMT (690kb) Title: Phase Coherent Link of an Atomic Clock to a Self-Referenced Microresonator Frequency Comb Authors: Pascal Del'Haye, Aurelien Coillet, Tara Fortier, Katja Beha, Daniel C. Cole, Ki Youl Yang, Hansuek Lee, Kerry J. Vahala, Scott B. Papp, Scott A. Diddams Categories: physics.optics \\ The counting and control of optical cycles of light has become common with modelocked laser frequency combs. But even with advances in laser technology, modelocked laser combs remain bulk-component devices that are hand-assembled. In contrast, a frequency comb based on the Kerr-nonlinearity in a dielectric microresonator will enable frequency comb functionality in a micro-fabricated and chip-integrated package suitable for use in a wide-range of environments. Such an advance will significantly impact fields ranging from spectroscopy and trace gas sensing, to astronomy, communications, atomic time keeping and photonic data processing. Yet in spite of the remarkable progress shown over the past years, microresonator frequency combs ("microcombs") have still been without the key function of direct f-2f self-referencing and phase-coherent frequency control that will be critical for enabling their full potential. Here we realize these missing elements using a low-noise 16.4 GHz silicon chip microcomb that is coherently broadened from its initial 1550 nm wavelength and subsequently f-2f self-referenced and phase-stabilized to an atomic clock. With this advance, we not only realize the highest repetition rate octave-span frequency comb ever achieved, but we highlight the low-noise microcomb properties that support highest atomic clock limited frequency stability. \\ ( http://arxiv.org/abs/1511.08103 , 690kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08107 Date: Wed, 25 Nov 2015 16:28:23 GMT (8227kb,D) Title: Formation and stability of a hollow electron beam in the presence of a plasma wake field driven by an ultra-short electron bunch Authors: F. Tanjia, R. Fedele, S. De Nicola, T. Akhter, D. Jovanovic Categories: physics.acc-ph physics.plasm-ph Comments: 6 pages, 9 figures \\ A numerical investigation on the spatiotemporal evolution of an electron beam, externally injected in a plasma in the presence of a plasma wake field, is carried out. The latter is driven by an ultra-short relativistic axially-symmetric femtosecond electron bunch. We first derive a novel Poisson-like equation for the wake potential where the driving term is the ultra-short bunch density, taking suitably into account the interplay between the sharpness and high energy of the bunch. Then, we show that a channel is formed longitudinally, through the externally injected beam while experiencing the effects of the bunch-driven plasma wake field, within the context of thermal wave model. The formation of the channel seems to be a final stage of the 3D evolution of the beam. This involves the appearance of small filaments and bubbles around the longitudinal axis. The bubbles coalesce forming a relatively stable axially-symmetric hollow beam structure. \\ ( http://arxiv.org/abs/1511.08107 , 8227kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08109 Date: Wed, 25 Nov 2015 16:37:32 GMT (4163kb) Title: What is the Brillouin Zone of an Anisotropic Photonic Crystal? Authors: P. Sivarajah, A. A. Maznev, B.K. Ofori-Okai, and K. A. Nelson Categories: physics.optics Comments: 9 pages, 6 figures \\ The concept of the Brillouin zone (BZ) in relation to a photonic crystal fabricated in an optically anisotropic material is explored both experimentally and theoretically. In experiment, we used femtosecond laser pulses to excite THz polaritons and image their propagation in lithium niobate and lithium tantalate photonic crystal (PhC) slabs. We directly measured the dispersion relation inside PhCs and observed that the lowest bandgap expected to form at the BZ boundary forms inside the BZ in the anisotropic lithium niobate PhC. Our analysis shows that in an anisotropic material the BZ - defined as the Wigner-Seitz cell in the reciprocal lattice - is no longer bounded by Bragg planes and thus does not conform to the original definition of the BZ by Brillouin. We construct an alternative Brillouin zone defined by Bragg planes and show its utility in identifying features of the dispersion bands. We show that for an anisotropic 2D PhC without dispersion, the Bragg plane BZ can be constructed by applying the Wigner-Seitz method to a stretched or compressed reciprocal lattice. We also show that in the presence of the dispersion in the underlying material or in a slab waveguide, the Bragg planes are generally represented by curved surfaces rather than planes. The concept of constructing a BZ with Bragg planes should prove useful in understanding the formation of dispersion bands in anisotropic PhCs and in selectively tailoring their optical properties. \\ ( http://arxiv.org/abs/1511.08109 , 4163kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08127 Date: Wed, 25 Nov 2015 17:26:47 GMT (4620kb,D) Title: Efficient Dielectric Metasurface Collimating Lenses for Mid-Infrared Quantum Cascade Lasers Authors: Amir Arbabi, Ryan M. Briggs, Yu Horie, Mahmood Bagheri, and Andrei Faraon Categories: physics.optics \\ Light emitted from single-mode semiconductor lasers generally has large divergence angles, and high numerical aperture lenses are required for beam collimation. Visible and near infrared lasers are collimated using aspheric glass or plastic lenses, yet collimation of mid-infrared quantum cascade lasers typically requires more costly aspheric lenses made of germanium, chalcogenide compounds, or other infrared-transparent materials. Here we report mid-infrared dielectric metasurface flat lenses that efficiently collimate the output beam of single-mode quantum cascade lasers. The metasurface lenses are composed of amorphous silicon posts on a flat sapphire substrate and can be fabricated at low cost using a single step conventional UV binary lithography. Mid-infrared radiation from a 4.8 $\mu$m distributed-feedback quantum cascade laser is collimated using a polarization insensitive metasurface lens with 0.86 numerical aperture and 79% transmission efficiency. The collimated beam has a half divergence angle of 0.36$^\circ$ and beam quality factor of $M^2$=1.02. \\ ( http://arxiv.org/abs/1511.08127 , 4620kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08129 Date: Wed, 25 Nov 2015 17:29:27 GMT (183kb) Title: Linked Coupled Cluster Monte Carlo Authors: Ruth S. T. Franklin, James S. Spencer, Alberto Zoccante and Alex J. W. Thom Categories: physics.chem-ph \\ We consider a new formulation of the stochastic coupled cluster method in terms of the similarity transformed Hamiltonian. We show that improvement in the granularity with which the wavefunction is represented results in a reduction in the critical population required to correctly sample the wavefunction for a range of systems and excitation levels and hence leads to a substantial reduction in the computational cost. This development has the potential to substantially extend the range of the method, enabling it to be used to treat larger systems with excitation levels not easily accessible with conventional deterministic methods. \\ ( http://arxiv.org/abs/1511.08129 , 183kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08145 Date: Wed, 25 Nov 2015 18:40:17 GMT (1336kb,D) Title: Observation of noise correlated by the Hawking effect in a water tank Authors: L.-P. Euv\'e, F. Michel, R. Parentani, T. G. Philbin and G. Rousseaux Categories: physics.flu-dyn gr-qc Comments: 6 pages, 10 figures \\ We measure the power spectrum and two-point correlation function for the fluctuating free surface on the downstream side of a stationary flow above an obstacle with high Froude number $F \approx 0.85$. On such a flow the scattering of incident long wavelength modes is analogous to that responsible for black hole radiation (the Hawking effect). Our measurements of the correlations clearly indicate a steady conversion of incident modes into pairs of modes of opposite energies. We then use a wave maker to measure the scattering coefficients responsible for this effect. \\ ( http://arxiv.org/abs/1511.08145 , 1336kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08151 Date: Sat, 31 Oct 2015 08:31:07 GMT (565kb) Title: Evidence for Torque Caused by a Magnetic Impulse on a Nonmagnetic Torsion Pendulum Authors: Jean Paul Mbelek Categories: physics.gen-ph Comments: (16 pages, 9 figures, 5 tables) Journal-ref: Grav. & Cosmol. 21 (2015) 340 DOI: 10.1134/S0202289315040118 \\ I have performed an experiment which is a variant of the one suggested recently by F. O. Minotti and T. E. Raptis. The aim of this experiment is to check the generation of a pulsed gravitational potential by a transient magnetic field as predicted by a scalar tensor theory of gravity. Such a scalar tensor theory allows an enhanced coupling of its fundamental long-range real scalar field as well as its external scalar field to the electromagnetic field, according to the author's previous papers. Several possible sources that could mimic the predicted effect have been ruled out. Finally, it seems likely that the predicted effect is there with the right order of magnitude, as expected. \\ ( http://arxiv.org/abs/1511.08151 , 565kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08159 Date: Wed, 25 Nov 2015 19:06:26 GMT (7474kb,D) Title: The stability of polarisation singularities in disordered photonic crystal waveguides Authors: Ben Lang, Daryl M. Beggs, Andrew B. Young, John G. Rarity, Ruth Oulton Categories: physics.optics Comments: 7 pages, 5 figures, supplementary attached with 7 pages and 5 figures \\ The effects of short range disorder on the polarisation characteristics of light in photonic crystal waveguides were investigated using finite difference time domain simulations with a view to investigating the stability of polarisation singularities. It was found that points of local circular polarisation (C-points) and contours of linear polarisation (L-lines) continued to appear even in the presence of high levels of disorder, and that they remained close to their positions in the ordered crystal. These results are a promising indication that devices exploiting polarisation in these structures are viable given current fabrication standards. \\ ( http://arxiv.org/abs/1511.08159 , 7474kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1507.03254 (*cross-listing*) Date: Sun, 12 Jul 2015 17:40:03 GMT (2538kb) Date (revised v2): Tue, 24 Nov 2015 20:18:01 GMT (2514kb) Title: Activation process in excitable systems with multiple noise sources: Large number of units Authors: Igor Franovi\'c, Matjaz Perc, Kristina Todorovi\'c, Sr{\dj}an Kosti\'c, Nikola Buri\'c Categories: nlin.CD physics.bio-ph q-bio.NC Comments: 14 two-column pages, 9 figures; accepted for publication in Physical Review E \\ We study the activation process in large assemblies of type II excitable units whose dynamics is influenced by two independent noise terms. The mean-field approach is applied to explicitly demonstrate that the assembly of excitable units can itself exhibit macroscopic excitable behavior. In order to facilitate the comparison between the excitable dynamics of a single unit and an assembly, we introduce three distinct formulations of the assembly activation event. Each formulation treats different aspects of the relevant phenomena, including the threshold-like behavior and the role of coherence of individual spikes. Statistical properties of the assembly activation process, such as the mean time-to-first pulse and the associated coefficient of variation, are found to be qualitatively analogous for all three formulations, as well as to resemble the results for a single unit. These analogies are shown to derive from the fact that global variables undergo a stochastic bifurcation from the stochastically stable fixed point to continuous oscillations. Local activation processes are analyzed in the light of the competition between the noise-led and the relaxation-driven dynamics. We also briefly report on a system-size anti-resonant effect displayed by the mean time-to-first pulse. \\ ( http://arxiv.org/abs/1507.03254 , 2514kb) ------------------------------------------------------------------------------ \\ arXiv:1507.03260 (*cross-listing*) Date: Sun, 12 Jul 2015 18:29:15 GMT (2253kb) Date (revised v2): Tue, 24 Nov 2015 20:15:48 GMT (2327kb) Title: Activation process in excitable systems with multiple noise sources: One and two interacting units Authors: Igor Franovi\'c, Kristina Todorovi\'c, Matjaz Perc, Neboj\v{s}a Vasovi\'c, Nikola Buri\'c Categories: nlin.CD physics.bio-ph q-bio.NC Comments: 18 two-column pages, 9 figures; accepted for publication in Physical Review E \\ We consider the coaction of two distinct noise sources on the activation process of a single and two interacting excitable units, which are mathematically described by the Fitzhugh-Nagumo equations. We determine the most probable activation paths around which the corresponding stochastic trajectories are clustered. The key point lies in introducing appropriate boundary conditions that are relevant for a class II excitable unit, which can be immediately generalized also to scenarios involving two coupled units. We analyze the effects of the two noise sources on the statistical features of the activation process, in particular demonstrating how these are modified due to the linear/nonlinear form of interactions. Universal properties of the activation process are qualitatively discussed in the light of a stochastic bifurcation that underlies the transition from a stochastically stable fixed point to continuous oscillations. \\ ( http://arxiv.org/abs/1507.03260 , 2327kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07905 (*cross-listing*) Date: Tue, 24 Nov 2015 22:41:32 GMT (2256kb) Title: Counterintuitive issues in the charge transport through molecular junctions Authors: Ioan Baldea Categories: cond-mat.mes-hall physics.chem-ph Journal-ref: Phys. Chem. Chem. Phys. 17, 31260 - 31269 (2015) DOI: 10.1039/C5CP05476A \\ Whether at phenomenological or microscopic levels, most theoretical approaches to charge transport through molecular junctions postulate or attempt to justify microscopically the existence of a dominant molecular orbital (MO). Within such single level descriptions, experimental current-voltage I-V curves are sometimes/often analyzed by using analytical formulas expressing the current as a cubic expansion in terms of the applied voltage V, and relate possible V-driven shifts of the level energy offset relative to the metallic Fermi energy \varepsilon_{0} to an asymmetry of molecule-electrode couplings or to an asymmetric location of the "center of gravity" of the MO with respect to electrodes. In this paper, we present results demonstrating the failure of these intuitive expectations. For example, we show how typical data processing based on cubic expansions yields a value of \varepsilon_0 underestimated by a typical factor of about two. When compared to theoretical results of DFT approaches, which typically underestimate the HOMO-LUMO gap by a similar factor, this may create the false impression of "agreement" with experiments in situations where this is actually not the case. Further, such cubic expansions yield model parameter values dependent on the bias range width employed for fitting, which is unacceptable physically. Finally, we present an example demonstrating that, counter-intuitively, the bias-induced change in the energy of an MO located much closer to an electrode can occur in a direction that is opposite to the change in the Fermi energy of that electrode. This is contrary to what one expects based on a "lever rule" argument, according to which the MO "feels" the local value of the electric potential, which is assumed to vary linearly across the junction and is closer to the potential of the closer electrode. \\ ( http://arxiv.org/abs/1511.07905 , 2256kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07924 (*cross-listing*) Date: Wed, 25 Nov 2015 00:26:12 GMT (154kb,D) Title: Study on Cooling of Positronium for Bose-Einstein Condensation Authors: Kenji Shu, Xing Fan, Takayuki Yamazaki, Toshio Namba, Shoji Asai, Kosuke Yoshioka, Makoto Kuwata-Gonokami Categories: cond-mat.quant-gas hep-ex physics.atom-ph \\ A new method of cooling positronium down is proposed to realize Bose-Einstein condensation of positronium. We perform detail studies about three processes (1) thermalization processes between positronium and silica walls of a cavity, (2) Ps-Ps scatterings and (3) Laser cooling. The thermalization process is shown to be not sufficient for BEC. Also Ps-Ps collision is shown to make a big effect on the cooling performance. We combine both methods and establish an efficient cooling for BEC. We also propose a new optical laser system for the cooling. \\ ( http://arxiv.org/abs/1511.07924 , 154kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07952 (*cross-listing*) Date: Wed, 25 Nov 2015 05:21:14 GMT (67kb,D) Title: On well-posedness of variational models of charged drops Authors: Cyrill B. Muratov and Matteo Novaga Categories: math.AP math-ph math.MP physics.flu-dyn Comments: 17 pages, 2 figures \\ Electrified liquids are well known to be prone to a variety of interfacial instabilities that result in the onset of apparent interfacial singularities and liquid fragmentation. In the case of electrically conducting liquids, one of the basic models describing the equilibrium interfacial configurations and the onset of instability assumes the liquid to be equipotential and interprets those configurations as local minimizers of the energy consisting of the sum of the surface energy and the electrostatic energy. Here we show that, surprisingly, this classical geometric variational model is mathematically ill-posed irrespectively of the degree to which the liquid is electrified. Specifically, we demonstrate that an isolated spherical droplet is never a local minimizer, no matter how small is the total charge on the droplet, since the energy can always be lowered by a smooth, arbitrarily small distortion of the droplet's surface. This is in sharp contrast with the experimental observations that a critical amount of charge is needed in order to destabilize a spherical droplet. We discuss several possible regularization mechanisms for the considered free boundary problem and argue that well-posedness can be restored by the inclusion of the entropic effects resulting in finite screening of free charges. \\ ( http://arxiv.org/abs/1511.07952 , 67kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07956 (*cross-listing*) Date: Wed, 25 Nov 2015 05:40:43 GMT (3924kb) Title: Conditional Generation Scheme for Entangled Vacuum Evacuated Coherent States by Mixing Two Coherent Beams with a Squeezed Vacuum State Authors: Sun-Hyun Youn Categories: quant-ph physics.optics Comments: 15 pages, 7 Figures \\ Conditions to generate high-purity entangled vacuum-evacuated coherent states ($|0>|\alpha>^0 - |-\alpha>^0 |0>$ were studied for two cascade-placed beam splitters, with one squeezed state input and two coherent state inputs whenever a single photon is detected. Controlling the amplitudes and the phases of the beams allows for various amplitudes of the vacuum-evacuated coherent states ($|\alpha>^ 0 = |\alpha> -e^{-|\alpha|^2} |0> $) up to $\alpha = 2.160$ to be manipulated with high-purity. \\ ( http://arxiv.org/abs/1511.07956 , 3924kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07995 (*cross-listing*) Date: Wed, 25 Nov 2015 08:53:51 GMT (6775kb,D) Title: Theoretical description of the efficiency enhancement in DSSC sensitized by newly synthesized heteroleptic Ru complexes Authors: Yavar T. Azar and Mahmoud Payami Categories: cond-mat.mtrl-sci physics.chem-ph Comments: 13 pages, 14 figures Journal-ref: Phys. Chem. Chem. Phys., Vol 17, 29574-29585 (2015) DOI: 10.1039/c5cp02947c \\ Recently, some new series of heteroleptic ruthenium-based dyes, the so-called RD dyes, were designed and synthesized showing better performances compared to the well-known homoleptic N719. In this work, using the density-functional theory and its time-dependent extension, we have investigated the electronic structure and absorption spectra of these newly synthesized dyes, and compared the results to those of N3 dye to describe the variations of the properties due to the molecular engineering of ancillary ligand. We have shown that the calculation results of the absorption spectra for these dyes using the PBE0 for the exchange-correlation functional are in a better agreement with the experiment than using B3LYP or range-separated CAM-B3LYP. We have also derived a formula based on the DFT and used it to visually describe the level shifts in a solvent. The higher $J_{sc}$ observed in these new dyes is explained by the fact that here, in contrast to N3, the excitation charge was effectively transferred to the anchoring ligand. Furthermore, we have shown that the difference dipole moment vectors of the ground and excited states can be used to determine the charge-transfer direction in an excitation process. Finally, the different electron lifetimes observed in these dyes is explained by investigating the adsorption geometries and the relative orientations of iodine molecules in different ``dye$\cdots$I$_2$'' complexes. \\ ( http://arxiv.org/abs/1511.07995 , 6775kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08011 (*cross-listing*) Date: Wed, 25 Nov 2015 10:25:53 GMT (982kb,D) Title: Unsteady flow and particle migration in dense, non-Brownian suspensions Authors: Michiel Hermes, Ben M. Guy, Guilhem Poy, Michael E. Cates, Matthieu Wyart, and Wilson C. K. Poon Categories: cond-mat.soft physics.flu-dyn \\ We present experimental results on dense corn-starch suspensions as examples of non-Brownian, nearly-hard particles that undergo continuous and discontinuous shear thickening (CST and DST) at intermediate and high densities respectively. Our results offer strong support for recent theories involving a stress-dependent effective contact friction among particles. We show however that in the DST regime, where theory might lead one to expect steady-state shear bands oriented layerwise along the vorticity axis, the real flow is unsteady. To explain this, we argue that steady-state banding is generically ruled out by the requirement that, for hard non-Brownian particles, the solvent pressure and the normal-normal component of the particle stress must balance separately across the interface between bands. (Otherwise there is an unbalanced migration flux.) However, long-lived transient shear-bands remain possible. \\ ( http://arxiv.org/abs/1511.08011 , 982kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08017 (*cross-listing*) Date: Wed, 25 Nov 2015 11:14:47 GMT (14kb) Title: A general framework for microscopically reversible processes with memory Authors: J. Ricardo Arias-Gonzalez Categories: cond-mat.stat-mech cond-mat.mes-hall physics.bio-ph Comments: 7 pages \\ Statistical Mechanics deals with ensembles of microstates that are compatible with fixed constraints and that on average define a thermodynamic macrostate. The evolution of a small system is normally subjected to changing constraints and involve a stochastic dependence on previous events. Here, we develop a theory for reversible processes with memory that comprises equilibrium statistics and that converge to the same physics in the limit of independent events. This framework is based on the characterization of single phase-space pathways and is used to derive ensemble-average dynamics in stochastic systems driven by a protocol in the limit of no friction. We show that the state of a system depends on its history to the extent of attaining a one-to-one correspondence between states and pathways when memory covers all the previous events. Equilibrium appears as the consequence of exploring all pathways that connect two states by all procedures. This theory is useful to interpret single-molecule experiments in Biophysics and other fields in Nanoscience and an adequate platform for a general theory of irreversible processes. \\ ( http://arxiv.org/abs/1511.08017 , 14kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08021 (*cross-listing*) Date: Wed, 25 Nov 2015 11:53:28 GMT (591kb) Title: Numerical reconstruction of pulsatile blood flow from 4D computer tomography angiography data Authors: Attila Lovas, R\'obert Nagy, Elek Csobo, Brigitta Szil\'agyi, P\'eter S\'otonyi Categories: math.NA physics.med-ph Comments: 15 pages, 4 figures MSC-class: 65M32, 65K10, 76Z05, 92C10, 92C50 \\ We present a novel numerical algorithm developed to reconstuct pulsatile blood flow from ECG-gated CT angiography data. A block-based optimization method was constructed to solve the inverse problem corresponding to the Riccati-type ordinary differential equation that can be deduced from conservation principles and Hooke's law. Local flow rate for 5 patients was computed in 10cm long aorta segments that are located 1cm below the heart. The wave form of the local flow rate curves seems to be realistic. Our approach is suitable for estimating characteristics of pulsatile blood flow in aorta based on ECG gated CT scan thereby contributing to more accurate description of several cardiovascular lesions. \\ ( http://arxiv.org/abs/1511.08021 , 591kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08068 (*cross-listing*) Date: Wed, 25 Nov 2015 14:15:06 GMT (1314kb,D) Title: The organization of the interbank network and how ECB unconventional measures affected the e-MID overnight market Authors: Paolo Barucca and Fabrizio Lillo Categories: q-fin.RM physics.data-an q-fin.MF Comments: 22 pages, 12 figures \\ The properties of the interbank market have been discussed widely in the literature. However a proper model selection between alternative organizations of the network in a small number of blocks, for example bipartite, core-periphery, and modular, has not been performed. In this paper, by inferring a Stochastic Block Model on the e-MID interbank market in the period 2010-2014, we show that in normal conditions the network is organized either as a bipartite structure or as a three community structure, where a group of intermediaries mediates between borrowers and lenders. In exceptional conditions, such as after LTRO, one of the most important unconventional measure by ECB at the beginning of 2012, the most likely structure becomes a random one and only in 2014 the e-MID market went back to a normal bipartite organization. By investigating the strategy of individual banks, we show that the disappearance of many lending banks and the strategy switch of a very small set of banks from borrower to lender is likely at the origin of this structural change. \\ ( http://arxiv.org/abs/1511.08068 , 1314kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08091 (*cross-listing*) Date: Wed, 25 Nov 2015 15:37:22 GMT (181kb) Title: Photon plasma--wave interaction via Compton scattering Authors: G Erochenkova, Cristel Chandre (CPT) Categories: nlin.CD physics.plasm-ph Report-no: JPA-48-49:495502 Journal-ref: Journal of Physics A: Mathematical and Theoretical, IOP Publishing, 2015, 48 (49), pp.495502. \<10.1088/1751-8113/48/49/495502\> DOI: 10.1088/1751-8113/48/49/495502 \\ The Kompaneets theory of photon kinetic evolution due to the Compton effect in the absence of absorption and emission is extended to the case of the Vlasov plasma wave oscillations. Under the assumption that the electron distribution function at equilibrium is perturbed by a solution of the linearised Vlasov equation in the long-wavelength limit, a solution of the Kompaneets kinetic equation for the photon distribution function is found and discussed. \\ ( http://arxiv.org/abs/1511.08091 , 181kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08094 (*cross-listing*) Date: Wed, 25 Nov 2015 15:41:25 GMT (1323kb) Title: Time-dependent Bragg diffraction bymultilayer gratings Authors: Jean-Michel Andr\'e (LCPMR), Philippe Jonnard (LCPMR) Categories: cond-mat.other physics.optics Journal-ref: Journal of Optics, Institute of Physics (IOP), 2015, 18, pp.015603 DOI: 10.1088/2040-8978/18/1/015603 \\ The time-dependent Bragg diffraction by multilayer gratings working by reflection or by transmission is investigated. The study is performed by generalizing the time-dependent coupled-wave theory previously developed for one-dimensional photonic crystal [Andr{\'e} J-M and Jonnard P, J. Opt. 17, 085609 (2015)] and also by extending the Takagi-Taupin approach of the dynamical theory of diffraction. The indicial response is calculated. It presents a time-delay with a transient time that is a function of the extinction length for reflection geometry and of the extinction length combined with the thickness of the grating for transmission geometry. \\ ( http://arxiv.org/abs/1511.08094 , 1323kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08112 (*cross-listing*) Date: Wed, 25 Nov 2015 16:48:22 GMT (4065kb) Title: Non-reciprocal nonlinear optic induced transparency and frequency conversion on a chip Authors: Xiang Guo, Chang-Ling Zou, Hojoong Jung, Hong X. Tang Categories: quant-ph physics.optics \\ Developments in photonic chips have spurred photon based classical and quantum information processing, attributing to the high stability and scalability of integrated photonic devices [1, 2]. Optical nonlinearity [3] is indispensable in these complex photonic circuits, because it allows for classical and quantum light sources, all-optical switch, modulation, and non-reciprocity in ambient environments. It is commonly known that nonlinear interactions are often greatly enhanced in the microcavities [4]. However, the manifestations of coherent photon-photon interaction in a cavity, analogous to the electromagnetically induced transparency [5], have never been reported on an integrated platform. Here, we present an experimental demonstration of the coherent photon-photon interaction induced by second order optical nonlinearity (\chi^{(2)} ) on an aluminum nitride photonic chip. The non-reciprocal nonlinear optic induced transparency is demonstrated as a result of the coherent interference between photons with different colors: ones in the visible wavelength band and ones in the telecom wavelength band. Furthermore, a wide-band frequency conversion with an almost unit internal (0.14 external) efficiency and a bandwidth up to 0.76\,\mathrm{GHz} is demonstrated. \\ ( http://arxiv.org/abs/1511.08112 , 4065kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08121 (*cross-listing*) Date: Wed, 25 Nov 2015 17:02:46 GMT (304kb) Title: Circular orbit spacecraft control at the L4 point using Lyapunov functions Authors: Rachana Agrawal and Ravi N Banavar Categories: math.DS physics.space-ph Comments: Submitted for review in European Control Conference 2016 \\ The objective of this work is to demonstrate the utility of Lyapunov functions in control synthesis for the purpose of maintaining and stabilizing a spacecraft in a circular orbit around the L4 point in the circular restricted three body problem (CRTBP). Incorporating the requirements of a fixed radius orbit and a desired angular momentum, a Lyapunov function is constructed and the requisite analysis is performed to obtain a controller. Asymptotic stability is proved in a defined region around the L4 point using LaSalle's principle. \\ ( http://arxiv.org/abs/1511.08121 , 304kb) ------------------------------------------------------------------------------ \\ arXiv:1511.08161 (*cross-listing*) Date: Wed, 25 Nov 2015 19:06:44 GMT (849kb,D) Title: Reaching Quantum Supremacy with a Boson Sampling Experiment Authors: Ludovico Latmiral Categories: quant-ph physics.chem-ph Comments: 11 pages, 5 figures, 4 tables MSC-class: 81P68, 68Q25, 94A20 \\ Boson Sampling represents a promising witness of the supremacy of quantum systems as a resource for the solution of computational problems. The classical hardness of Boson Sampling has been related to the so called Permanent-of-Gaussians Conjecture and has been extended to some generalizations such as scattershot Boson Sampling, approximate and lossy sampling under some reasonable constraints. However, it is still unclear how demanding these bounds are for a quantum experimental sampler. Starting from a state of the art analysis and focusing on the foreseeable practical conditions needed to reach quantum supremacy, we look at different techniques and present a more general and effective solution. We apply our approach to both the experimental suggestions presented to date and we eventually find in both cases a new threshold that is less error sensitive and experimentally more feasible. \\ ( http://arxiv.org/abs/1511.08161 , 849kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:0807.0711 replaced with revised version Wed, 25 Nov 2015 19:02:53 GMT (3kb) Title: A note on temperature without energy - a social example Authors: Krzysztof Kulakowski Categories: physics.soc-ph Comments: 2+epsilon pages \\ ( http://arxiv.org/abs/0807.0711 , 3kb) ------------------------------------------------------------------------------ \\ arXiv:0807.1903 replaced with revised version Wed, 25 Nov 2015 08:49:26 GMT (200kb) Title: Execution Details for Space Experiment Proposed for General Relativity Authors: Abhijit Biswas, Krishnan RS Mani Categories: physics.gen-ph Comments: 9 pages \\ ( http://arxiv.org/abs/0807.1903 , 200kb) ------------------------------------------------------------------------------ \\ arXiv:1104.3493 replaced with revised version Wed, 25 Nov 2015 18:28:09 GMT (474kb) Title: Synchronization of Kuramoto Oscillators on Knots Authors: Amelia Carolina Sparavigna Categories: physics.comp-ph nlin.CD Comments: Knots, Knot diagrams, Kuramoto model, (revised title) Journal-ref: Int. J. Sci. 2(7):85-88 (2013) DOI: 10.18483/ijSci.217 \\ ( http://arxiv.org/abs/1104.3493 , 474kb) ------------------------------------------------------------------------------ \\ arXiv:1207.2918 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 18:01:55 GMT (665kb) Title: Distortional Lifshitz Vectors and Helicity in Nematic Free Energy Density Authors: Amelia Carolina Sparavigna Categories: cond-mat.soft physics.pop-ph Comments: Nematics, Liquid Crystals, Free energy density, Lifshitz invariants, Corrected typos Journal-ref: The International Journal of Sciences, 2013, 2(2), 54-59 \\ ( http://arxiv.org/abs/1207.2918 , 665kb) ------------------------------------------------------------------------------ \\ arXiv:1411.1912 replaced with revised version Wed, 25 Nov 2015 15:12:46 GMT (3149kb,D) Title: Observation of a single-beam gradient force acoustical trap for elastic particles: acoustical tweezers Authors: Diego Baresch, Jean-Louis Thomas, R\'egis Marchiano Categories: physics.class-ph cond-mat.soft \\ ( http://arxiv.org/abs/1411.1912 , 3149kb) ------------------------------------------------------------------------------ \\ arXiv:1411.7114 replaced with revised version Wed, 25 Nov 2015 12:06:47 GMT (13kb) Title: A Novel Dissipation Property of the Master Equation Authors: Liu Hong, Chen Jia, Yi Zhu, Wen-An Yong Categories: physics.chem-ph math-ph math.MP math.PR Comments: 17 pages \\ ( http://arxiv.org/abs/1411.7114 , 13kb) ------------------------------------------------------------------------------ \\ arXiv:1502.05274 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 11:17:54 GMT (134kb) Title: How predictable is technological progress? Authors: J. Doyne Farmer, Francois Lafond Categories: q-fin.EC physics.soc-ph \\ ( http://arxiv.org/abs/1502.05274 , 134kb) ------------------------------------------------------------------------------ \\ arXiv:1504.05077 replaced with revised version Wed, 25 Nov 2015 14:22:34 GMT (1863kb,D) Title: Cooperative emission of a pulse train in an optically thick scattering medium Authors: C.C. Kwong and T. Yang and D. Delande and R. Pierrat and D. Wilkowski Categories: physics.atom-ph Comments: 5 pages, 3 figures Journal-ref: Phys. Rev. Lett. 115, 223601 (2015) \\ ( http://arxiv.org/abs/1504.05077 , 1863kb) ------------------------------------------------------------------------------ \\ arXiv:1505.02078 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 14:29:42 GMT (5976kb) Title: Kinetics of symmetry and asymmetry in a phase-separating bilayer membrane Authors: John J. Williamson, Peter D. Olmsted Categories: cond-mat.soft cond-mat.stat-mech physics.bio-ph Comments: Typos corrected. In press, Phys. Rev. E., Supplemental Material (videos) will be available through the journal website \\ ( http://arxiv.org/abs/1505.02078 , 5976kb) ------------------------------------------------------------------------------ \\ arXiv:1505.03630 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 03:02:26 GMT (941kb) Title: Testing helicity dependent $\gamma\gamma\rightarrow\gamma\gamma$ scattering in the region of MeV Authors: Kensuke Homma, Kayo Matsuura, Kazuhisa Nakajima Categories: hep-ex physics.ins-det Comments: 14 pages, 7 figures. Accepted by PTEP \\ ( http://arxiv.org/abs/1505.03630 , 941kb) ------------------------------------------------------------------------------ \\ arXiv:1506.05501 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 12:20:58 GMT (194kb) Title: Atmospheric Chemistry for Astrophysicists: A Self-consistent Formalism and Analytical Solutions for Arbitrary C/O Authors: Kevin Heng, James R. Lyons, Shang-Min Tsai Categories: astro-ph.EP physics.ao-ph physics.chem-ph physics.class-ph Comments: Accepted by ApJ. 9 pages, 4 figures \\ ( http://arxiv.org/abs/1506.05501 , 194kb) ------------------------------------------------------------------------------ \\ arXiv:1507.07223 replaced with revised version Wed, 25 Nov 2015 06:01:13 GMT (693kb) Title: Pulsed UCN production using a Doppler shifter at J-PARC Authors: S. Imajo, K. Mishima, M. Kitaguchi, Y. Iwashia, N. L. Yamada, M. Hino, T. Oda, T. Ino, H. M. Shimizu, S. Yamashita, R. Katayama Categories: physics.ins-det hep-ex Comments: 32 pages, 15 fugures. A grammatical error was fixed \\ ( http://arxiv.org/abs/1507.07223 , 693kb) ------------------------------------------------------------------------------ \\ arXiv:1507.08152 replaced with revised version Wed, 25 Nov 2015 15:15:08 GMT (3082kb,D) Title: Anisotropic metamaterial as an analogue of a black hole Authors: Isabel Fern\'andez-N\'u\~nez, Oleg Bulashenko Categories: physics.optics gr-qc Comments: 19 pages, 10 figures; final version Journal-ref: Physics Letters A 380 (2016) 1-8 DOI: 10.1016/j.physleta.2015.10.043 \\ ( http://arxiv.org/abs/1507.08152 , 3082kb) ------------------------------------------------------------------------------ \\ arXiv:1508.05319 (*cross-listing*) replaced with revised version Tue, 24 Nov 2015 21:33:03 GMT (78kb,D) Title: Extending Landauer's Bound from Bit Erasure to Arbitrary Computation Authors: David H. Wolpert Categories: cond-mat.stat-mech physics.bio-ph Comments: 10 pages, 1 figure \\ ( http://arxiv.org/abs/1508.05319 , 78kb) ------------------------------------------------------------------------------ \\ arXiv:1509.04264 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 13:00:05 GMT (445kb) Title: Agent based simulations visualize Adam Smith's invisible hand by solving Friedrich Hayek's Economic Calculus Authors: Klaus Jaffe Categories: q-fin.EC cs.MA physics.soc-ph Comments: Econophysics, Complexity, Synergy \\ ( http://arxiv.org/abs/1509.04264 , 445kb) ------------------------------------------------------------------------------ \\ arXiv:1509.05071 (*cross-listing*) replaced with revised version Tue, 24 Nov 2015 22:22:31 GMT (743kb,D) Title: The Michaelis-Menten reaction scheme as a unified approach towards the optimal restart problem Authors: Tal Rotbart, Shlomi Reuveni, and Michael Urbakh Categories: cond-mat.stat-mech physics.bio-ph \\ ( http://arxiv.org/abs/1509.05071 , 743kb) ------------------------------------------------------------------------------ \\ arXiv:1509.06635 replaced with revised version Wed, 25 Nov 2015 02:34:52 GMT (18kb) Title: Bremsstrahlung from few-electron ions Authors: Alexei M. Frolov and David M. Wardlaw Categories: physics.atom-ph \\ ( http://arxiv.org/abs/1509.06635 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08928 replaced with revised version Wed, 25 Nov 2015 02:39:04 GMT (16kb) Title: On the Hamilton approach to the metric GR Authors: Alexei M. Frolov Categories: physics.gen-ph \\ ( http://arxiv.org/abs/1509.08928 , 16kb) ------------------------------------------------------------------------------ \\ arXiv:1510.00914 replaced with revised version Wed, 25 Nov 2015 04:48:35 GMT (82kb) Title: Co-action provides rational basis for the evolution of cooperation Authors: V. Sasidevan, Sitabhra Sinha Categories: physics.soc-ph cs.GT Comments: 7 pages, 2 figures \\ ( http://arxiv.org/abs/1510.00914 , 82kb) ------------------------------------------------------------------------------ \\ arXiv:1510.02311 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 12:30:20 GMT (21kb) Title: On determining absolute entropy without quantum theory or the Third Law of thermodynamics Authors: Andrew Steane Categories: cond-mat.stat-mech physics.chem-ph physics.hist-ph Comments: 16 pages, 2 figures; minor clarifications in v.2 \\ ( http://arxiv.org/abs/1510.02311 , 21kb) ------------------------------------------------------------------------------ \\ arXiv:1510.04766 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 02:41:32 GMT (13kb) Title: Photodetachment cross-section of the negatively charged hydrogen ion Authors: Alexei M. Frolov Categories: astro-ph.SR physics.atom-ph Comments: arXiv admin note: substantial text overlap with arXiv:1505.00004 \\ ( http://arxiv.org/abs/1510.04766 , 13kb) ------------------------------------------------------------------------------ \\ arXiv:1510.07512 replaced with revised version Wed, 25 Nov 2015 15:19:50 GMT (3909kb,D) Title: Machine Learning, Quantum Mechanics, and Chemical Compound Space Authors: Raghunathan Ramakrishnan and O. Anatole von Lilienfeld Categories: physics.chem-ph \\ ( http://arxiv.org/abs/1510.07512 , 3909kb) ------------------------------------------------------------------------------ \\ arXiv:1511.01769 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 16:54:25 GMT (4982kb,D) Title: Ultralow-Noise SiN Trampoline MEMS for Sensing and Optomechanics Authors: Christoph Reinhardt, Tina M\"uller, Alexandre Bourassa, Jack C. Sankey Categories: cond-mat.mes-hall physics.optics Comments: 7 pages, 3 figures, 1 table \\ ( http://arxiv.org/abs/1511.01769 , 4982kb) ------------------------------------------------------------------------------ \\ arXiv:1511.06590 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 16:28:46 GMT (7349kb,D) Title: Consistent treatment of hydrophobicity in protein lattice models accounts for cold denaturation Authors: Erik van Dijk, Patrick Varilly, Tuomas Knowles, Daan Frenkel and Sanne Abeln Categories: cond-mat.soft physics.bio-ph q-bio.BM Comments: Added and corrected references for design procedure in main text (p. 2) and in Supplemental Information (p. 8) \\ ( http://arxiv.org/abs/1511.06590 , 7349kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07135 replaced with revised version Wed, 25 Nov 2015 01:17:15 GMT (290kb,D) Title: Trajectories entropy in dynamical graphs with memory Authors: Francesco Caravelli Categories: physics.soc-ph cond-mat.dis-nn Comments: 9 pages double column, 8 figures \\ ( http://arxiv.org/abs/1511.07135 , 290kb) ------------------------------------------------------------------------------ \\ arXiv:1511.07649 (*cross-listing*) replaced with revised version Wed, 25 Nov 2015 04:59:04 GMT (1131kb) Title: Comparative computational study of lithium and sodium insertion in van der Waals and covalent tetracyanoethylene (TCNE) -based crystals as promising materials for organic lithium and sodium ion batteries Authors: Yingqian Chen and Sergei Manzhos Categories: cond-mat.mtrl-sci physics.chem-ph Comments: 26 pages, 7 figures \\ ( http://arxiv.org/abs/1511.07649 , 1131kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- For subscribe options to combined physics archives, e-mail To: physics@arxiv.org, Subject: subscribe ----------------------------------------------------------------------------- For help on viewing and making submissions, see http://arxiv.org/help/