Date: Tue, 29 Sep 15 00:32:21 GMT Subject: hep-th daily 13 new + 14 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: hep-th@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Fri 25 Sep 15 20:00:00 GMT to Mon 28 Sep 15 20:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1509.07872 Date: Fri, 25 Sep 2015 20:04:40 GMT (22kb,D) Title: Fermionic T-Duality of $AdS_n \times S^n (\times S^n) \times T^m$ using IIA Supergravity Authors: Michael C. Abbott, Justine Tarrant and Jeff Murugan Categories: hep-th Comments: 16 pages \\ We show that the string backgrounds AdS2 x S2 x T6 and AdSd x Sd x Sd x T{10 - 3d} (d = 2, 3) are self-dual under a series of bosonic and fermionic T-dualities. We do this using the fermionic Buscher rules derived by Berkovits and Maldacena, thus working at the level of the supergravity fields. This allows us to explicitly track the behaviour of the RR fields, from which we see that we need T-duality along some torus directions. For the AdS x S x S cases, which contain cosets of D(2,1;alpha), it is necessary to perform bosonic T-duality along some complexified Killing spinors in one of the spheres. \\ ( http://arxiv.org/abs/1509.07872 , 22kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07876 Date: Fri, 25 Sep 2015 20:06:58 GMT (1709kb,D) Title: Complexity Equals Action Authors: Adam R. Brown, Daniel A. Roberts, Leonard Susskind, Brian Swingle, and Ying Zhao Categories: hep-th Comments: 11 pages, 2 figures \\ We conjecture that the quantum complexity of a holographic state is dual to the action of a certain spacetime region that we call a Wheeler-DeWitt patch. We illustrate and test the conjecture in the context of neutral, charged, and rotating black holes in AdS, as well as black holes perturbed with static shells and with shock waves. This conjecture evolved from a previous conjecture that complexity is dual to spatial volume, but appears to be a major improvement over the original. In light of our results, we discuss the hypothesis that black holes are the fastest computers in nature. \\ ( http://arxiv.org/abs/1509.07876 , 1709kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07885 Date: Fri, 25 Sep 2015 20:28:14 GMT (728kb,D) Title: Strong subadditivity and holography Authors: Andrea Prudenziati Categories: hep-th Comments: 36 pages, two appendices \\ We study in detail the relationship between strong subadditivity for a boundary field theory and energy conditions for its bulk dual in 2+1 dimensions. We provide a discussion of known facts and new results organized from the simplest case of a static system with collinear intervals to a time dependent one in a generic configuration, with particular focus on the holographic geometric description. \\ ( http://arxiv.org/abs/1509.07885 , 728kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07886 Date: Mon, 21 Sep 2015 20:03:02 GMT (52kb) Title: Systematic Renormalization of the Effective Theory of Large Scale Structure Authors: Ali Akbar Abolhasani, Mehrdad Mirbabayi, and Enrico Pajer Categories: hep-th astro-ph.CO Comments: 28+14 \\ A perturbative description of Large Scale Structure is a cornerstone of our understanding of the observed distribution of matter in the universe. Renormalization is an essential and defining step to make this description physical and predictive. Here we introduce a systematic renormalization procedure, which neatly associates counterterms to the UV-sensitive diagrams order by order, as it is commonly done in quantum field theory. As a concrete example, we renormalize the one-loop power spectrum and bispectrum of both density and velocity. In addition, we present a series of results that are valid to all orders in perturbation theory. First, we show that while systematic renormalization requires temporally non-local counterterms, in practice one can use an equivalent basis made of local operators. We give an explicit prescription to generate all counterterms allowed by the symmetries. Second, we present a formal proof of the well-known general argument that the contribution of short distance perturbations to large scale density contrast $\delta$ and momentum density $\mathbf\pi(\mathbf k)$ scale as $k^2$ and $k$, respectively. Third, we demonstrate that the common practice of introducing counterterms only in the Euler equation when one is interested in correlators of $ \delta$ is indeed valid to all orders. \\ ( http://arxiv.org/abs/1509.07886 , 52kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08027 Date: Sat, 26 Sep 2015 21:12:52 GMT (55kb) Title: Ultraviolet behavior of 6D supersymmetric Yang-Mills theories and harmonic superspace Authors: Guillaume Bossard, Evgeny Ivanov and Andrei Smilga Categories: hep-th Comments: 55 pages Report-no: CPHT-RR036.0915 \\ We revisit the issue of higher-dimensional counterterms for the N=(1,1) supersymmetric Yang-Mills (SYM) theory in six dimensions using the off-shell N=(1,0) and on-shell N=(1,1) harmonic superspace approaches. The second approach is developed in full generality and used to solve, for the first time, the N=(1,1) SYM constraints in terms of N=(1,0) superfields. This provides a convenient tool to write explicit expressions for the candidate counterterms and other N=(1,1) invariants and may be conducive to proving non-renormalization theorems needed to explain the absence of certain logarithmic divergences in higher-loop contributions to scattering amplitudes in N=(1,1) SYM. \\ ( http://arxiv.org/abs/1509.08027 , 55kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08055 Date: Sun, 27 Sep 2015 06:10:46 GMT (220kb) Title: Manifestly N=2 supersymmetric regularization for N=2 supersymmetric field theories Authors: I.L.Buchbinder, N.G.Pletnev, K.V.Stepanyantz Categories: hep-th Comments: 14 pages, 3 figures \\ We formulate the higher covariant derivative regularization for N=2 supersymmetric gauge theories in N=2 harmonic superspace. This regularization is constructed by adding the N=2 supersymmetric higher derivative term to the classical action and inserting the N=2 supersymmetric Pauli--Villars determinants into the generating functional for removing one-loop divergencies. Unlike all other regularization schemes in N=2 supersymmetric quantum field theory, this regularization preserves by construction the manifest N=2 supersymmetry at all steps of calculating loop corrections to the effective action. Together with N=2 supersymmetric background field method this regularization allows to calculate quantum corrections without breaking the manifest gauge symmetry and N=2 supersymmetry. Thus, we justify the assumption about existence of a regularization preserving N=2 supersymmetry, which is a key element of the N=2 non-renormalization theorem. As a result, we give the prove of the N=2 non-renormalization theorem which does not require any additional assumptions. \\ ( http://arxiv.org/abs/1509.08055 , 220kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08064 Date: Sun, 27 Sep 2015 07:53:29 GMT (11kb) Title: Axiomatic conformal field theory in dimensions >2 and AdS/CFT Authors: Albert Schwarz Categories: hep-th math-ph math.MP Comments: 10 pages \\ We formulate axioms of CFT in dimensions $>2$ modifying Segal's axioms for two-dimensional CFT. We use these axioms to derive the AdS/CFT correspondence. \\ ( http://arxiv.org/abs/1509.08064 , 11kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08072 Date: Sun, 27 Sep 2015 09:10:03 GMT (41kb) Title: Induced vacuum bosonic current in a compactified cosmic string spacetime Authors: E. A. F. Bragan\c{c}a, H. F. Santana Mota and E. R. Bezerra de Mello Categories: hep-th Comments: 10 pages and 3 figures. To appear in the proceedings of the 9th Alexander Friedmann International Seminar \\ We analyze the bosonic current densities induced by a magnetic flux running along an idealized cosmic string considering that the coordinate along its axis is compactified. We also consider the presence of a magnetic flux enclosed by the compactificatified axis. To develop this analysis, we calculate the complete set of normalized bosonic wave functions obeying a quasiperiodicity condition along the compactified dimension. We show that in this context only the azimuthal and axial currents take place. \\ ( http://arxiv.org/abs/1509.08072 , 41kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08127 Date: Sun, 27 Sep 2015 19:34:23 GMT (1673kb,D) Title: The four-loop six-gluon NMHV ratio function Authors: Lance J. Dixon, Matt von Hippel and Andrew J. McLeod Categories: hep-th Comments: 74 pages, 12 figures, 7 tables Report-no: SLAC--PUB--16352, CALT--2015--049 \\ We use the hexagon function bootstrap to compute the ratio function which characterizes the next-to-maximally-helicity-violating (NMHV) six-point amplitude in planar $\mathcal{N} = 4$ super-Yang-Mills theory at four loops. A powerful constraint comes from dual superconformal invariance, in the form of a $\bar{Q}$ differential equation, which heavily constrains the first derivatives of the transcendental functions entering the ratio function. At four loops, it leaves only a 34-parameter space of functions. Constraints from the collinear limits, and from the multi-Regge limit at the leading-logarithmic (LL) and next-to-leading-logarithmic (NLL) order, suffice to fix these parameters and obtain a unique result. We test the result against multi-Regge predictions at NNLL and N$^3$LL, and against predictions from the operator product expansion involving one and two flux-tube excitations; all cross-checks are satisfied. We study the analytical and numerical behavior of the parity-even and parity-odd parts on various lines and surfaces traversing the three-dimensional space of cross ratios. As part of this program, we characterize all irreducible hexagon functions through weight eight in terms of their coproduct. We also provide representations of the ratio function in particular kinematic regions in terms of multiple polylogarithms. \\ ( http://arxiv.org/abs/1509.08127 , 1673kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08129 Date: Sun, 27 Sep 2015 19:43:14 GMT (7851kb,D) Title: Lovelock gravity, black holes and holography Authors: Xi\'an O. Camanho Categories: hep-th gr-qc Comments: PhD thesis, defended September 20, 2013. arXiv admin note: text overlap with arXiv:hep-th/0309246, arXiv:gr-qc/0305004 by other authors \\ This thesis is divided in two separate parts, the first concerned with gravitational aspects of Lovelock theories, the second with some of their holographic applications. \\ ( http://arxiv.org/abs/1509.08129 , 7851kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08164 Date: Mon, 28 Sep 2015 00:16:45 GMT (136kb,D) Title: Classical limit of irregular blocks and Mathieu functions Authors: Marcin Piatek, Artur R. Pietrykowski Categories: hep-th Comments: 41 pages, 1 figure \\ The Nekrasov-Shatashvili limit of the N=2 SU(2) pure gauge (Omega-deformed) super Yang-Mills theory encodes the information about the spectrum of the Mathieu operator. On the other hand, the Mathieu equation emerges entirely within the frame of two-dimensional conformal field theory (2d CFT) as the classical limit of the null vector decoupling equation for some degenerate irregular block. Therefore, it seems to be possible to investigate the spectrum of the Mathieu operator employing the techniques of 2d CFT. To exploit this strategy, a full correspondence between the Mathieu equation and its realization within 2d CFT has to be established. In our previous paper [1], we have found that the expression of the Mathieu eigenvalue given in terms of the classical irregular block exactly coincides with the well known weak coupling expansion of this eigenvalue in the case in which the auxiliary parameter is the noninteger Floquet exponent. In the present work we verify that the formula for the corresponding eigenfunction obtained from the irregular block reproduces the so-called Mathieu exponent from which the noninteger order elliptic cosine and sine functions may be constructed. The derivation of the Mathieu equation within the formalism of 2d CFT is based on conjectures concerning the asymptotic behaviour of irregular blocks in the classical limit. A proof of these hypotheses is sketched. Finally, we speculate on how it could be possible to use the methods of 2d CFT in order to get from the irregular block the eigenvalues of the Mathieu operator in other regions of the coupling constant. \\ ( http://arxiv.org/abs/1509.08164 , 136kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08370 Date: Mon, 28 Sep 2015 15:50:09 GMT (10kb) Title: Reformulation of Georgi-Glashow model and its infrared limits Authors: Ahmad Mohamadnejad Categories: hep-th hep-ph Comments: 16 pages. arXiv admin note: text overlap with arXiv:hep-th/0105163 by other authors \\ We study SU(2) Georgi-Glashow model and suggest a decomposition for its fields and obtain a Lagrangian based on new variables. These new variables are more appropriate for low energy limit of the model. We reach to the Cho restricted decomposition as a result of a vacuum condition of Georgi-Glashow model. This model with no external sources leads us to the Cho extended decomposition. We also study another vacuum condition and get a new infrared limit of the model. Finally, we argue about a decomposition form that Faddeev and Niemi proposed in this new infrared limit of Georgi-Glashow model. \\ ( http://arxiv.org/abs/1509.08370 , 10kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08448 Date: Mon, 28 Sep 2015 19:50:30 GMT (1049kb,D) Title: Breaking integrability at the boundary: the sine-Gordon model with Robin boundary conditions Authors: Robert Arthur, Patrick Dorey, Robert Parini Categories: hep-th math-ph math.MP \\ We explore boundary scattering in the sine-Gordon model with a non-integrable family of Robin boundary conditions. The soliton content of the field after collision is analysed using a numerical implementation of the direct scattering problem associated with the inverse scattering method. We find that the antikink may be reflected into various combinations of an antikink, a kink, and one or more breathers, depending on the values of the initial antikink velocity and a parameter associated with the boundary condition. In addition we observe regions with an intricate resonance structure arising from the creation of an intermediate breather whose recollision with the boundary is highly dependent on the breather phase. \\ ( http://arxiv.org/abs/1509.08448 , 1049kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1509.07864 (*cross-listing*) Date: Fri, 25 Sep 2015 20:03:53 GMT (804kb,D) Title: Causality issues of particle detector models in QFT and Quantum Optics Authors: Eduardo Martin-Martinez Categories: quant-ph gr-qc hep-th Comments: 17 pages, 6 figures. RevTeX 4.1 \\ We analyze the constraints that causality imposes on some of the particle detector models employed in quantum field theory in general, and in particular on those used in quantum optics (or superconducting circuits) to model atoms interacting with light. Namely, we show that disallowing faster-than-light communication can impose severe constraints on the applicability of particle detector models in three different common scenarios: 1) when the detectors are spatially smeared, 2) when a UV cutoff is introduced in the theory and 3) under one of the most typical approximations made in quantum optics: the rotating-wave approximation. We identify in which scenarios the models' causal behaviour can be cured and in which it cannot. \\ ( http://arxiv.org/abs/1509.07864 , 804kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07865 (*cross-listing*) Date: Fri, 25 Sep 2015 20:03:54 GMT (76kb,D) Title: Composite fermions and the field-tuned superconductor-insulator transition Authors: Michael Mulligan and S. Raghu Categories: cond-mat.str-el hep-th Comments: 7 pages, 2 figures \\ In several two-dimensional films that exhibit a magnetic field-tuned superconductor to insulator transition (SIT), stable metallic phases have been observed. Building on the `dirty boson' description of the SIT, we suggest that the metallic region is analogous to the composite Fermi liquid observed about half-filled Landau levels of the two-dimensional electron gas. The composite fermions here are mobile vortices attached to one flux quantum of an emergent gauge field. The composite vortex liquid is a 2D non-Fermi liquid metal, which we argue is stable to weak quenched disorder. We describe several experimental consequences of the emergent composite vortex liquid. \\ ( http://arxiv.org/abs/1509.07865 , 76kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07954 (*cross-listing*) Date: Sat, 26 Sep 2015 09:23:28 GMT (1620kb) Title: Naked singularity and black hole formation in self-similar Einstein-scalar fields with exponential potentials Authors: Xuefeng Zhang and Xinliang An Categories: gr-qc hep-th Comments: 23 pages, 6 figures \\ Motivated by cosmic censorship in general relativity and string theory, we extend Christodoulou's celebrated examples of naked singularity formation in the Einstein-massless scalar field system to include a positive or negative scalar potential of exponential forms, i.e., $V(\phi)=\pm\exp(2\phi/\kappa)$ with a parameter $\kappa$. Under spherical symmetry and a self-similar ansatz depending on $\kappa$, we derive a 3-dimensional autonomous system of first-order ordinary differential equations, which incorporates the equations for massless scalar fields as a special case. Local behavior of the phase space is studied analytically with global solutions constructed numerically. Within the 3-dimensional solution manifold, we observe, for the negative potentials, naked singularity formation from nonsingular initial data for $\kappa^2<1$. Meanwhile, transitions between solutions containing naked singularities and black holes are also identified. However, when the potential is taken positive, numerical evolutions result in formation of black holes, but not naked singularities. \\ ( http://arxiv.org/abs/1509.07954 , 1620kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07956 (*cross-listing*) Date: Sat, 26 Sep 2015 09:33:35 GMT (214kb) Title: Examples of naked singularity formation in higher-dimensional Einstein-vacuum spacetimes Authors: Xinliang An, Xuefeng Zhang, and H. L\"u Categories: gr-qc hep-th Comments: 15 pages, 2 figures \\ The vacuum Einstein equations in 5+1 dimensions are shown to admit solutions describing naked singularity formation in gravitational collapse from nonsingular asymptotically locally flat initial data. We present a class of specific examples with spherical extra dimensions. Thanks to the Kaluza-Klein dimensional reduction, these spacetimes are constructed by lifting continuously self-similar solutions of the 4-dimensional Einstein-scalar field system with a negative exponential potential. Their existence provides a new test-bed for weak cosmic censorship in higher-dimensional gravity. In addition, we point out why a similar attempt of embedding Christodoulou's well-known solutions for massless scalar fields fails to capture formation of naked singularities in 4+1 dimensions. \\ ( http://arxiv.org/abs/1509.07956 , 214kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07976 (*cross-listing*) Date: Sat, 26 Sep 2015 13:25:31 GMT (13kb) Title: The laws of thermodynamics and information for emergent cosmology Authors: M. Hashemi, S. Jalalzadeh and S. Vasheghani Farahani Categories: gr-qc hep-th Comments: 10 pages, no figures, to appear in Gen. Rel. Grav \\ The aim here is to provide a set of equations for cosmology in terms of information and thermodynamical parameters. The method we implement in order to describe the universe is a development of Padmanabhan\rq{}s approach which is based on the fact that emergence of the cosmic space is provided by the evolution of the cosmic time. In this line we obtain the Friedmann equation or its equivalent the conservation law in terms of information by the implementation of Laundauer\rq{}s principle or in other words the information loss/production rate. Hence, a self consistent description of the universe is provided in terms of thermodynamical parameters. This is due to the fact that in this work the role of information which is the most important actor of all times, has stepped in to cosmology. We provide a picture of the emergent cosmology merely based on the information theory. In addition, we introduce a novel entropy on the horizon, which can also generalize Bekenstein-Hawking entropy for the asymptotic holographic principle. \\ ( http://arxiv.org/abs/1509.07976 , 13kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08093 (*cross-listing*) Date: Sun, 27 Sep 2015 13:35:09 GMT (812kb) Title: Phase transitions in hexagonal, graphene-like lattice sheets and nanotubes under the influence of external conditions Authors: D. Ebert, K.G. Klimenko, P.B. Kolmakov, V.Ch. Zhukovsky Categories: cond-mat.mes-hall hep-th Comments: 26 pages, 6 figures \\ In this paper we consider a class of (2+1)D schematic models with four-fermion interactions that are effectively used in studying condensed-matter systems with planar crystal structure, and especially graphene. Symmetry breaking in these models occurs due to a possible appearance of condensates. Special attention is paid to the symmetry properties of the appearing condensates in the framework of discrete chiral and $\mathcal C$, $\mathcal P$ and $\mathcal T$ transformations. Moreover, boundary conditions corresponding to carbon nanotubes are considered and their relations with the effect of an applied external magnetic field are studied. To this end we calculated the effective potential for the nanotube model including effects of finite temperature, density and an external magnetic field. As an illustration we made numerical calculations of the chiral symmetry properties in a simpler Gross--Neveu model with only one condensate taken into account. We also investigated the phase structure of the nanotube model under the influence of the Aharonov--Bohm effect and demonstrated that there is a nontrivial relation between the magnitude of the Aharonov--Bohm phase, compactification of the spatial dimension and thermal restoration of the originally broken chiral symmetry. \\ ( http://arxiv.org/abs/1509.08093 , 812kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08181 (*cross-listing*) Date: Mon, 28 Sep 2015 02:51:07 GMT (12kb) Title: Perfect fluids with $\omega=\mathrm{const}$ as sources of scalar cosmological perturbations Authors: Maxim Eingorn, Ruslan Brilenkov Categories: gr-qc astro-ph.CO hep-ph hep-th Comments: 7 pages, no figures \\ After constructing a self-consistent first-order perturbation scheme, being suitable for all (sub-horizon and super-horizon) scales, for the concordance cosmological model and discrete presentation of matter sources in the recent paper arXiv:1509.03835, the next natural step consists in generalizing its approach to the case of extended models with extra perfect fluids and continuous presentation. In the given paper this suggesting itself generalization is made. Namely, we derive a single equation determining the scalar perturbation and covering the whole space as well as define the corresponding universal Yukawa interaction range. \\ ( http://arxiv.org/abs/1509.08181 , 12kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08204 (*cross-listing*) Date: Mon, 28 Sep 2015 05:47:35 GMT (2743kb) Title: Low-$\ell$ CMB from String-Scale SUSY Breaking? Authors: A. Sagnotti Categories: astro-ph.CO gr-qc hep-ph hep-th Comments: 16 pages, LaTeX, 22 eps figures. Based on the presentations at the International School for Subnuclear Physics, 53rd Course, "The Future of our Physics Including New Frontiers," Erice, June 24 -- July 3 2015, and at "Physics on the Riviera 2015," Sestri Levante, September 16--18 2015 \\ Models of inflation are instructive playgrounds for supersymmetry breaking in Supergravity and String Theory. In particular, combinations of branes and orientifolds that are not mutually BPS can lead to \emph{brane supersymmetry breaking}, a phenomenon where non--linear realizations are accompanied, in tachyon--free vacua, by the emergence of steep exponential potentials. When combined with milder terms, these exponentials can lead to slow--roll after a fast ascent and a turning point. This leaves behind distinctive patterns of scalar perturbations, where pre--inflationary peaks can lie well apart from an almost scale invariant profile. I review recent attempts to connect these power spectra to the low--$\ell$ CMB, and a corresponding one--parameter extension of $\Lambda$CDM with a low--frequency cut $\Delta$. A detailed likelihood analysis led to $\Delta = (0.351 \pm 0.114) \times 10^{-3} \, \mbox{Mpc}^{-1}$, at $99.4\%$ confidence level, in an extended Galactic mask with $f_{sky}=39\%$, to be compared with a nearby value at $88.5\%$ in the standard Planck 2015 mask with $f_{sky}=94\%$. In these scenarios one would be confronted, in the CMB, with relics of an epoch of deceleration that preceded the onset of slow--roll. \\ ( http://arxiv.org/abs/1509.08204 , 2743kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08213 (*cross-listing*) Date: Mon, 28 Sep 2015 06:47:33 GMT (27kb) Title: Recurrence Relations of the Multi-Indexed Orthogonal Polynomials : III Authors: Satoru Odake Categories: math-ph hep-th math.CA math.MP nlin.SI Comments: 37 pages Report-no: DPSU-15-1 \\ In a previous paper, we presented conjectures of the recurrence relations with constant coefficients for the multi-indexed orthogonal polynomials of Laguerre, Jacobi, Wilson and Askey-Wilson types. In this paper we present a proof for the Laguerre and Jacobi cases. Their bispectral properties are also discussed, which give a method to obtain the coefficients of the recurrence relations explicitly. \\ ( http://arxiv.org/abs/1509.08213 , 27kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08253 (*cross-listing*) Date: Mon, 28 Sep 2015 09:46:14 GMT (16kb) Title: Weak Measurements, Quantum State Collapse and the Born Rule Authors: Apoorva Patel and Parveen Kumar Categories: quant-ph cond-mat.other hep-th Comments: Revtex, 5 pages, 1 figure. text overlap with arXiv:1412.1312 \\ Projective measurement is used as a fundamental axiom in quantum mechanics, even though it is discontinuous and cannot predict which measured operator eigenstate will be observed in which experimental run. The probabilistic Born rule gives it an ensemble interpretation, predicting proportions of various outcomes over many experimental runs. Understanding gradual weak measurements requires replacing this scenario with a dynamical evolution equation for the collapse of the quantum state in individual experimental runs. We propose such an equation, which combines attraction towards the measured operator eigenstates with stochastic white noise, and for a specific ratio of the two reproduces the Born rule. The irreducible measurement noise then becomes a fundamental property of quantum mechanics, and a necessary ingredient for any attempt to generate quantum mechanics from an underlying theory. \\ ( http://arxiv.org/abs/1509.08253 , 16kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08264 (*cross-listing*) Date: Mon, 28 Sep 2015 10:53:53 GMT (118kb) Title: Reheating signature in the gravitational wave spectrum from self-ordering scalar fields Authors: Sachiko Kuroyanagi, Takashi Hiramatsu, Jun'ichi Yokoyama Categories: astro-ph.CO gr-qc hep-ph hep-th Comments: 12 pages, 9 figures Report-no: APCTP Pre2015-007, YITP-15-61, RESCEU-22/15 \\ We investigate the imprint of reheating on the gravitational wave spectrum produced by self-ordering of multi-component scalar fields after a global phase transition. The equation of state of the Universe during reheating, which usually has different behaviour from that of a radiation-dominated Universe, affects the evolution of gravitational waves through the Hubble expansion term in the equations of motion. This gives rise to a different power-law behavior of frequency in the gravitational wave spectrum. The reheating history is therefore imprinted in the shape of the spectrum. We perform $512^3$ lattice simulations to investigate how the ordering scalar field reacts to the change of the Hubble expansion and how the reheating effect arises in the spectrum. We also compare the result with inflation-produced gravitational waves, which has a similar spectral shape, and discuss whether it is possible to distinguish the origin between inflation and global phase transition by detecting the shape with future direct detection gravitational wave experiments such as DECIGO. \\ ( http://arxiv.org/abs/1509.08264 , 118kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08286 (*cross-listing*) Date: Mon, 28 Sep 2015 12:04:12 GMT (773kb,D) Title: Holographic entropy and real-time dynamics of quarkonium dissociation in non-Abelian plasma Authors: Ioannis Iatrakis and Dmitri E. Kharzeev Categories: hep-ph hep-th nucl-th Comments: 7 pages, 5 figures \\ The peak of the heavy quark pair entropy at the deconfinement transition, observed in lattice QCD, suggests that the transition is effectively driven by the increase of the entropy of bound states. The growth of the entropy with the inter-quark distance leads to the emergent entropic force that induces dissociation of quarkonium states. Since the quark-gluon plasma around the transition point is a strongly coupled system, we use the gauge-gravity duality to study the entropy of heavy quarkonium and the real-time dynamics of its dissociation. In particular, we employ the Improved Holographic QCD model as a dual description of large $N_c$ Yang Mills theory. Studying the dynamics of the fundamental string between the quarks placed on the boundary, we find that the entropy peaks at the transition point. We also study the real-time dynamics of the system by considering the holographic string falling in the black hole horizon where it equilibrates. In the vicinity the deconfinement transition, the dissociation time is found to be less than a fermi, suggesting that the entropic destruction is the dominant dissociation mechanism in this temperature region. \\ ( http://arxiv.org/abs/1509.08286 , 773kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08324 (*cross-listing*) Date: Mon, 28 Sep 2015 14:05:33 GMT (148kb,D) Title: Calculating Three Loop Ladder and V-Topologies for Massive Operator Matrix Elements by Computer Algebra Authors: J. Ablinger, A. Behring, J. Bl\"umlein, A. De Freitas, A. von Manteuffel and C. Schneider Categories: hep-ph cs.SC hep-th math-ph math.MP Comments: 110 pages Latex, 4 Figures Report-no: DESY 15--049, DO--TH 15/06, MITP/15-080 \\ Three loop ladder and $V$-topology diagrams contributing to the massive operator matrix element $A_{Qg}$ are calculated. The corresponding objects can all be expressed in terms of nested sums and recurrences depending on the Mellin variable $N$ and the dimensional parameter $\varepsilon$. Given these representations, the desired Laurent series expansions in $\varepsilon$ can be obtained with the help of our computer algebra toolbox. Here we rely on generalized hypergeometric functions and Mellin-Barnes representations, on difference ring algorithms for symbolic summation, on an optimized version of the multivariate Almkvist-Zeilberger algorithm for symbolic integration, and on new methods to calculate Laurent series solutions of coupled systems of differential equations. The solutions can be computed for general coefficient matrices directly for any basis also performing the expansion in the dimensional parameter in case it is expressible in terms of indefinite nested product-sum expressions. This structural result is based on new results of our difference ring theory. In the cases discussed we deal with iterative sum- and integral-solutions over general alphabets. The final results are expressed in terms of special sums, forming quasi-shuffle algebras, such as nested harmonic sums, generalized harmonic sums, and nested binomially weighted (cyclotomic) sums. Analytic continuations to complex values of $N$ are possible through the recursion relations obeyed by these quantities and their analytic asymptotic expansions. The latter lead to a host of new constants beyond the multiple zeta values, the infinite generalized harmonic and cyclotomic sums in the case of $V$-topologies. \\ ( http://arxiv.org/abs/1509.08324 , 148kb) ------------------------------------------------------------------------------ \\ arXiv:1509.08338 (*cross-listing*) Date: Fri, 25 Sep 2015 15:30:17 GMT (8kb) Title: The graviton Higgs mechanism Authors: Ivan Arraut Categories: gr-qc hep-th Comments: 5 pages, Version published in Europhysics Letters (EPL) Journal-ref: Europhys. Lett. 111 (2015) 61001 \\ The Higgs mechanism at the graviton level formulated as a Vainshtein mechanism in time domains implies that the extra-degrees of freedom become relevant depending on the direction of time (frame of reference) with respect to the preferred time direction (preferred frame) defined by the St\"uckelberg function $T_0(r,t)$ which contains the information of the extra-degrees of freedom of the theory. In this manuscript, I make the general definition of the Higgs mechanism by analyzing the gauge symmetries of the action and the general form of the vacuum solutions for the graviton field. In general, the symmetry generators depending explicitly on the St\"uckelberg fields are broken at the vacuum level. These broken generators, define the number of Nambu-Goldstone bosons which will be eating up by the dynamical metric in order to become massive. \\ ( http://arxiv.org/abs/1509.08338 , 8kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1207.4891 (*cross-listing*) replaced with revised version Sun, 27 Sep 2015 12:24:34 GMT (31kb) Title: Cosmic strings with twisted magnetic flux lines and wound-strings in extra dimensions Authors: Matthew Lake and Jun'ichi Yokoyama Categories: gr-qc hep-ph hep-th Comments: 34 pages, no figures. Revised text incorporating the the results included in erratum JCAP 08 (2013) E01 Report-no: RESCEU-37/12 Journal-ref: JCAP 09 (2012) 030 [JCAP 08 (2013) E01] DOI: 10.1088/1475-7516/2012/09/030 \\ ( http://arxiv.org/abs/1207.4891 , 31kb) ------------------------------------------------------------------------------ \\ arXiv:1312.1420 (*cross-listing*) replaced with revised version Sat, 26 Sep 2015 10:31:02 GMT (46kb) Title: Null fluid collapse in brane world models Authors: Tiberiu Harko and Matthew J. Lake Categories: gr-qc astro-ph.HE hep-th Comments: 24 pages, no figures. Published version Journal-ref: Phys. Rev. D 89, 064038 (2014) DOI: 10.1103/PhysRevD.89.064038 \\ ( http://arxiv.org/abs/1312.1420 , 46kb) ------------------------------------------------------------------------------ \\ arXiv:1406.7677 replaced with revised version Sat, 26 Sep 2015 17:54:13 GMT (3726kb) Title: On the Time Evolution of Holographic n-partite Information Authors: Mohsen Alishahiha, M. Reza Mohammadi Mozaffar, Mohammad Reza Tanhayi Categories: hep-th Comments: 48 pages, 29 figures; v2: Reference added; v3: Few comments and numerical results added; v4: minor modifications to match published version \\ ( http://arxiv.org/abs/1406.7677 , 3726kb) ------------------------------------------------------------------------------ \\ arXiv:1410.6267 (*cross-listing*) replaced with revised version Sat, 26 Sep 2015 08:21:36 GMT (20kb) Title: Dynamics of cosmic strings with higher-dimensional windings Authors: Daisuke Yamauchi and Matthew J. Lake Categories: hep-ph gr-qc hep-th Comments: 15 pages, no figures. Published version Report-no: RESCEU-43/14 Journal-ref: JCAP 1506, no. 06, 023 (2015) DOI: 10.1088/1475-7516/2015/06/023 \\ ( http://arxiv.org/abs/1410.6267 , 20kb) ------------------------------------------------------------------------------ \\ arXiv:1503.02623 replaced with revised version Mon, 28 Sep 2015 19:21:59 GMT (303kb,D) Title: Scaling Behaviour of Quiver Quantum Mechanics Authors: Heeyeon Kim Categories: hep-th Comments: 28 pages, 5 figures, minor typo corrected \\ ( http://arxiv.org/abs/1503.02623 , 303kb) ------------------------------------------------------------------------------ \\ arXiv:1503.02811 replaced with revised version Sun, 27 Sep 2015 13:35:51 GMT (22kb) Title: Cosmological Solution Moduli of Bigravity Authors: Nejat Tevfik Yilmaz Categories: hep-th gr-qc Comments: 33 pages \\ ( http://arxiv.org/abs/1503.02811 , 22kb) ------------------------------------------------------------------------------ \\ arXiv:1503.04355 (*cross-listing*) replaced with revised version Fri, 25 Sep 2015 21:27:57 GMT (7kb) Title: Quantum massive conformal gravity Authors: F. F. Faria Categories: gr-qc hep-th Comments: v2: 10 pages, quantization procedure changed \\ ( http://arxiv.org/abs/1503.04355 , 7kb) ------------------------------------------------------------------------------ \\ arXiv:1503.07575 replaced with revised version Mon, 28 Sep 2015 16:40:58 GMT (0kb,I) Title: Inflation and Dark Energy from a Scalar Field in Supergravity Authors: Ricardo C. G. Landim Categories: hep-th astro-ph.CO Comments: This paper has been withdrawn by the author due to a numerical error \\ ( http://arxiv.org/abs/1503.07575 , 0kb) ------------------------------------------------------------------------------ \\ arXiv:1504.01772 (*cross-listing*) replaced with revised version Fri, 25 Sep 2015 20:51:51 GMT (951kb) Title: Singular deformations of nearly $R^2$ inflation potentials Authors: S.D. Odintsov, V. K. Oikonomou Categories: gr-qc astro-ph.CO hep-th Comments: Revised Version, to appear in CQG \\ ( http://arxiv.org/abs/1504.01772 , 951kb) ------------------------------------------------------------------------------ \\ arXiv:1505.00286 (*cross-listing*) replaced with revised version Sun, 27 Sep 2015 08:55:44 GMT (108kb,D) Title: An analytic regularisation scheme on curved spacetimes with applications to cosmological spacetimes Authors: Antoine G\'er\'e, Thomas-Paul Hack and Nicola Pinamonti Categories: math-ph gr-qc hep-th math.MP Comments: 39 pages, two figures MSC-class: 81T20l \\ ( http://arxiv.org/abs/1505.00286 , 108kb) ------------------------------------------------------------------------------ \\ arXiv:1505.02095 replaced with revised version Mon, 28 Sep 2015 15:05:49 GMT (31kb) Title: Newton-Cartan (super)gravity as a non-relativistic limit Authors: Eric Bergshoeff, Jan Rosseel, Thomas Zojer Categories: hep-th gr-qc Comments: 29 pages; v2: added comment about different NR gravities and more refs; v3: more refs, matches published version Report-no: UG-15-68, TUW-15-16 Journal-ref: Class.Quant.Grav. 32 (2015) 205003 DOI: 10.1088/0264-9381/32/20/205003 \\ ( http://arxiv.org/abs/1505.02095 , 31kb) ------------------------------------------------------------------------------ \\ arXiv:1505.03500 replaced with revised version Mon, 28 Sep 2015 12:09:20 GMT (70kb) Title: Rigid 4D N=2 supersymmetric backgrounds and actions Authors: Daniel Butter, Gianluca Inverso and Ivano Lodato Categories: hep-th Comments: 50 + 17 pages; v2: minor corrections, published version Report-no: Nikhef-2015-020 \\ ( http://arxiv.org/abs/1505.03500 , 70kb) ------------------------------------------------------------------------------ \\ arXiv:1505.03556 replaced with revised version Mon, 28 Sep 2015 16:09:13 GMT (678kb) Title: A Non-minimally Coupled Potential for Inflation and Dark Energy after Planck 2015: A Comprehensive Study Authors: Mehdi Eshaghi, Moslem Zarei, Nematollah Riazi, Ahmad Kiasatpour Categories: hep-th astro-ph.CO Comments: 11 pages, 5 figures \\ ( http://arxiv.org/abs/1505.03556 , 678kb) ------------------------------------------------------------------------------ \\ arXiv:1505.04843 (*cross-listing*) replaced with revised version Mon, 28 Sep 2015 18:25:51 GMT (7kb) Title: Gravitons to Photons -- attenuation of gravitational waves Authors: Preston Jones and Douglas Singleton Categories: gr-qc hep-th Comments: 8 pages, 0 figures, awarded an "honorable mention" in the 2015 Gravity Research Foundation Essay Contest. Typos corrected \\ ( http://arxiv.org/abs/1505.04843 , 7kb) ------------------------------------------------------------------------------ \\ arXiv:1505.05727 (*cross-listing*) replaced with revised version Fri, 25 Sep 2015 21:51:30 GMT (2249kb) Title: Emergence of product of constant curvature spaces in loop quantum cosmology Authors: Naresh Dadhich, Anton Joe, Parampreet Singh Categories: gr-qc astro-ph.CO hep-th Comments: References added. Published in CQG Journal-ref: Class. Quantum. Grav. 32, 185006 (2015) DOI: 10.1088/0264-9381/32/18/185006 \\ ( http://arxiv.org/abs/1505.05727 , 2249kb) ------------------------------------------------------------------------------ \\ arXiv:1505.07546 (*cross-listing*) replaced with revised version Mon, 28 Sep 2015 10:18:00 GMT (11kb) Title: Hojman Symmetry in $f(T)$ Theory Authors: Hao Wei, Ya-Nan Zhou, Hong-Yu Li, Xiao-Bo Zou Categories: gr-qc astro-ph.CO hep-th Comments: 10 pages, revtex4; v2: discussions added, Astrophys. Space Sci. in press \\ ( http://arxiv.org/abs/1505.07546 , 11kb) ------------------------------------------------------------------------------ \\ arXiv:1506.00714 (*cross-listing*) replaced with revised version Mon, 28 Sep 2015 01:19:10 GMT (20kb) Title: Null lifts and projective dynamics Authors: Marco Cariglia Categories: math-ph gr-qc hep-th math.MP Comments: 11 pages, no figures. Some minor changes, typos amended Journal-ref: Ann. Phys. 362 (2015) 642-658 DOI: 10.1016/j.aop.2015.09.002 \\ ( http://arxiv.org/abs/1506.00714 , 20kb) ------------------------------------------------------------------------------ \\ arXiv:1506.03081 (*cross-listing*) replaced with revised version Fri, 25 Sep 2015 20:04:26 GMT (3186kb,D) Title: Harvesting correlations from the quantum vacuum Authors: Alejandro Pozas-Kerstjens and Eduardo Martin-Martinez Categories: quant-ph gr-qc hep-th Comments: 17 pages, 5 figures. RevTeX 4.1. V2: A few typos corrected. Added Journal reference Journal-ref: Phys. Rev. D 92, 064042 (2015) DOI: 10.1103/PhysRevD.92.064042 \\ ( http://arxiv.org/abs/1506.03081 , 3186kb) ------------------------------------------------------------------------------ \\ arXiv:1506.04465 replaced with revised version Mon, 28 Sep 2015 02:43:21 GMT (258kb) Title: Higgs phenomenon for higher spin fields on AdS_3 Authors: Thomas Creutzig and Yasuaki Hikida Categories: hep-th Comments: 29 pages, 4 figures, minor changes, references added, version to appear in JHEP Report-no: RUP-15-13 \\ ( http://arxiv.org/abs/1506.04465 , 258kb) ------------------------------------------------------------------------------ \\ arXiv:1508.04083 (*cross-listing*) replaced with revised version Mon, 28 Sep 2015 17:44:23 GMT (411kb) Title: Axion Induced Oscillating Electric Dipole Moment of the Electron Authors: Christopher T. Hill Categories: hep-ph astro-ph.CO hep-ex hep-th Comments: 13 pages, 1 figure; v3 improves discussion in Section V, corrects typos and minor changes in some numerical estimates for phased arrays Report-no: FERMILAB-PUB-15-350-T \\ ( http://arxiv.org/abs/1508.04083 , 411kb) ------------------------------------------------------------------------------ \\ arXiv:1508.05485 (*cross-listing*) replaced with revised version Mon, 28 Sep 2015 02:59:35 GMT (15kb) Title: The $Z_2$ Index of Disordered Topological Insulators with Time Reversal Symmetry Authors: Hosho Katsura and Tohru Koma Categories: math-ph cond-mat.dis-nn cond-mat.mes-hall hep-lat hep-th math.MP Comments: 17 pages, no figure, v2: minor corrections, Appendix C and references added \\ ( http://arxiv.org/abs/1508.05485 , 15kb) ------------------------------------------------------------------------------ \\ arXiv:1509.01378 (*cross-listing*) replaced with revised version Sun, 27 Sep 2015 03:45:58 GMT (490kb) Title: Black Holes and Thunderbolt Singularities with Lifshitz Scaling Terms Authors: Yosuke Misonoh and Kei-ichi Maeda Categories: gr-qc hep-th Comments: 24 pages, 17 figures, 6 tables; v2 : typos corrected, minor changes, version accepted for publication in PRD \\ ( http://arxiv.org/abs/1509.01378 , 490kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07270 replaced with revised version Mon, 28 Sep 2015 07:48:47 GMT (147kb) Title: New type of hill-top inflation: CFT driven cosmology Authors: A.O. Barvinsky and A.Yu. Kamenshchik Categories: hep-th gr-qc Comments: a reference is added \\ ( http://arxiv.org/abs/1509.07270 , 147kb) ------------------------------------------------------------------------------ \\ arXiv:1509.07764 (*cross-listing*) replaced with revised version Mon, 28 Sep 2015 10:43:18 GMT (27kb) Title: Slices to sums of adjoint orbits, the Atiyah-Hitchin manifold, and Hilbert schemes of points Authors: Roger Bielawski Categories: math.DG hep-th math.SG Comments: 25 pages; corrected a silly mistake concerning double covers of Atiyah-Hitchin \\ ( http://arxiv.org/abs/1509.07764 , 27kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/