Date: Mon, 30 Jan 12 01:06:14 GMT Subject: gr-qc daily 9 new + 9 crosses received by eprepget ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ Send any comments regarding submissions directly to submitter. ------------------------------------------------------------------------------ Archives at http://arxiv.org/ To unsubscribe, e-mail To: gr-qc@arXiv.org, Subject: cancel ------------------------------------------------------------------------------ received by eprepget from Thu 26 Jan 12 21:00:00 GMT to Fri 27 Jan 12 21:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1201.5647 Date: Thu, 26 Jan 2012 21:02:38 GMT (18kb) Title: Ekpyrotic universes in $F(R)$ Ho\v{r}ava-Lifshitz gravity Authors: A. J. L\'opez-Revelles, Ratbay Myrzakulov, Diego S\'aez-G\'omez Categories: gr-qc astro-ph.CO hep-th Comments: 12 pages \\ The Ekpyrotic scenario is studied in the context of some extensions of Ho\v{r}ava-Lifshitz gravity. Some particular solutions that lead to cyclic Hubble parameters are analyzed, where the corresponding gravitational actions are reconstructed by using several techniques and auxiliary fields. Its comparison with standard $F(R)$ gravity is performed. In addition, the so-called Little Rip, a stage of the universe evolution when some bounded systems may be dissolute, is also studied in this frame of theories. \\ ( http://arxiv.org/abs/1201.5647 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5656 Date: Thu, 26 Jan 2012 21:37:54 GMT (286kb) Title: Comparison of Atom Interferometers and Light Interferometers as Space-Based Gravitational Wave Detectors Authors: John G. Baker and James Ira Thorpe Categories: gr-qc Comments: to be submitted to Physical Review Letters \\ We consider a class of proposed gravitational wave detectors based on multiple atomic interferometers separated by large baselines and referenced by common laser systems. We compute the sensitivity limits of these detectors due to intrinsic phase noise of the light sources, non-inertial motion of the light sources, and atomic shot noise and compare them to sensitivity limits for traditional light interferometers. We find that atom interferometers and light interferometers are limited in a nearly identical way by intrinsic phase noise and that both require similar mitigation strategies (e.g. multiple arm instruments) to reach interesting sensitivities. The sensitivity limit from motion of the light sources is slightly different and favors the atom interferometers in the low-frequency limit, although the limit in both cases is severe. \\ ( http://arxiv.org/abs/1201.5656 , 286kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5672 Date: Thu, 26 Jan 2012 23:11:54 GMT (392kb) Title: Phase space analysis of quintessence fields trapped in a Randall-Sundrum Braneworld: anisotropic Bianchi I brane Authors: Dagoberto Escobar, Carlos R. Fadragas, Genly Leon, and Yoelsy Leyva Categories: gr-qc hep-th Comments: 11 pages, 11 figures \\ In this paper we investigate, from the dynamical systems perspective, the evolution of an scalar field with arbitrary potential trapped in a Randall-Sundrum's Braneworld of type 2. We consider an homogeneous but anisotropic Bianchi I (BI) brane filled also with a perfect fluid. We also consider the effect of the projection of the five-dimensional Weyl tensor onto the three-brane. Using the center manifold theory we obtain sufficient conditions for the asymptotic stability of de Sitter solution with standard 4D behavior. We also prove that there are not late time de Sitter attractors with 5D-modifications since they are always saddle-like. This fact correlates with a transient primordial inflation. We present here sufficient conditions on the potential for the stability of the scalar field-matter scaling solution, the scalar field-dominated solution, and the scalar field-dark radiation scaling solution. We illustrate our analytical findings using a simple $f$-deviser as a toy model. All these results are generalizations of our previous results obtained for FRW branes. \\ ( http://arxiv.org/abs/1201.5672 , 392kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5685 Date: Fri, 27 Jan 2012 01:14:40 GMT (7kb) Title: Klein-Gordon equation from Maxwell-Lorentz dynamics Authors: Ricardo J. Alonso-Blanco Categories: gr-qc math-ph math.AP math.MP Comments: 7 pages \\ We consider Maxwell-Lorentz dynamics: this is to say, Newton law under the action of a Lorentz force which obeys Maxwell equations. A natural class of solutions are those given by lagrangian submanifolds of the phase space when it is endowed with the symplectic structure modified by the electromagnetic field. We have found that the existence of this type of solution leads us directly to the Klein-Gordon equation as a compatibility condition. \\ ( http://arxiv.org/abs/1201.5685 , 7kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5715 Date: Fri, 27 Jan 2012 08:08:05 GMT (136kb,D) Title: Approximate Waveforms for Extreme-Mass-Ratio Inspirals: The Chimera Scheme Authors: Carlos F. Sopuerta and Nicolas Yunes Categories: gr-qc astro-ph.CO astro-ph.HE Comments: 10 pages, 3 figures. LaTeX, JPCS style. Submitted to the proceedings of the 9th Edoardo Amaldi Conference on Gravitational Waves, and the 2011 Numerical Relativity - Data Analysis (NRDA) meeting, held 10-15 July 2011 in Cardiff, Wales, UK, July 10-15 2011 \\ We describe a new kludge scheme to model the dynamics of generic extreme-mass-ratio inspirals (EMRIs; stellar compact objects spiraling into a spinning supermassive black hole) and their gravitational-wave emission. The Chimera scheme is a hybrid method that combines tools from different approximation techniques in General Relativity: (i) A multipolar, post-Minkowskian expansion for the far-zone metric perturbation (the gravitational waveforms) and for the local prescription of the self-force; (ii) a post-Newtonian expansion for the computation of the multipole moments in terms of the trajectories; and (iii) a BH perturbation theory expansion when treating the trajectories as a sequence of self-adjusting Kerr geodesics. The EMRI trajectory is made out of Kerr geodesic fragments joined via the method of osculating elements as dictated by the multipolar post-Minkowskian radiation-reaction prescription. We implemented the proper coordinate mapping between Boyer-Lindquist coordinates, associated with the Kerr geodesics, and harmonic coordinates, associated with the multipolar post-Minkowskian decomposition. The Chimera scheme is thus a combination of approximations that can be used to model generic inspirals of systems with extreme to intermediate mass ratios, and hence, it can provide valuable information for future space-based gravitational-wave observatories, like LISA, and even for advanced ground detectors. The local character in time of our multipolar post-Minkowskian self-force makes this scheme amenable to study the possible appearance of transient resonances in generic inspirals. \\ ( http://arxiv.org/abs/1201.5715 , 136kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5720 Date: Fri, 27 Jan 2012 08:35:55 GMT (16kb) Title: The fractal bubble model with a cosmological constant Authors: Stefano Viaggiu Categories: gr-qc astro-ph.CO hep-th Comments: Published on Class. Quantum Grav Journal-ref: Class. Quantum Grav. 29(2012) 035016 DOI: 10.1088/0264-9381/29/3/035016 \\ We generalize the fractal bubble model (FB), recently proposed in the literature as an alternative to the standard $\Lambda$CDM cosmology, to include a non-zero cosmological constant. We retain the same volume partition of voids and walls as the original FB model, and the same matching conditions for null geodesics, but do not include effects associated with a nonuniform time flow arising from differences of quasilocal gravitational energy that may arise in the coarse-graining process. The Buchert equations are written and partially integrated and the asymptotic behaviour of the solutions is given. For a universe with $\Lambda=0$, as it is the case in the FB model, an initial void fraction with hyperbolic curvature evolves in such a way that it asymptotically fills completely our particle horizon. Conversely, in presence of a non vanishing $\Lambda$, we show that this does not happen and the voids fill a finite fraction $f_{v_{\infty}}<1$, where the value of $(1-f_{v_{\infty}})$ is expected to depend on $\Lambda$ and the initial fraction $f_{vi}$ and also to be small. For its determination, a numerical integration of the equations is necessary. Finally, an interesting prediction of our model is a formula giving a minimum allowed value of present day dark energy as a function of the age of the universe and of the matter and curvature density parameters at our time. \\ ( http://arxiv.org/abs/1201.5720 , 16kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5725 Date: Fri, 27 Jan 2012 09:00:01 GMT (8kb) Title: Bounds on M/R for Charged Objects with positive Cosmological constant Authors: H{\aa}kan Andr\'easson, Christian B\"ohmer, Atifah Mussa Categories: gr-qc Comments: 11 pages \\ We consider charged spherically symmetric static solutions of the Einstein-Maxwell equations with a positive cosmological constant $\Lambda$. If $r$ denotes the area radius, $m_g$ and $q$ the gravitational mass and charge of a sphere with area radius $r$ respectively, we find that for any solution which satisfies the condition $p+2p_{\perp}\leq \rho,$ where $p\geq 0$ and $p_{\perp}$ are the radial and tangential pressures respectively, $\rho\geq 0$ is the energy density, and for which $0\leq \frac{q^2}{r^2}+\Lambda r^2\leq 1,$ the inequality $\frac{m_g}{r} \leq 2/9+\frac{q^2}{r^2}-\frac{\Lambda r^2}{3}+2/9\sqrt{1+\frac{3q^2}{r^2}+3\Lambda r^2}$ holds. We also investigate the issue of sharpness, and we show that the inequality is sharp in a few cases but generally this question is open. \\ ( http://arxiv.org/abs/1201.5725 , 8kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5806 Date: Fri, 27 Jan 2012 15:53:23 GMT (18kb) Title: Unfinished History and Paradoxes of Quantum Potential. II. Relativistic Point of View Authors: E. A. Tagirov (Joint Institute for Nuclear Research, Dubna, Russia) Categories: gr-qc Comments: 15 pages, based on the plenary talk at the A. Z. Petrov Centenary Memorial International Symposium, 1-7.11.2010, Kazan, Russia \\ This is the second of the two related papers analysing origins and possible explanations of a paradoxical phenomenon of the quantum potential (QP). It arises in quantum mechanics'(QM) of a particle in the Riemannian $n$-dimensional configurational space obtained by various procedures of quantization of the non-relativistic natural Hamilton systems. Now, the two questions are investigated: 1)Does QP appear in the non-relativistic QM generated by the quantum theory of scalar field (QFT) non-minimally coupled to the space-time metric? 2)To which extent is it in accord with quantization of the natural systems? To this end, the asymptotic non-relativistic equation for the particle-interpretable wave functions and operators of canonical observables are obtained from the primary QFT objects. It is shown that, in the globally-static space-time, the Hamilton operators coincide at the origin of the quasi-Euclidean space coordinates in the both altenative approaches for any constant of non-minimality $\tilde\xi$, but a certain requirement of the Principle of Equivalence to the quantum field propagator distinguishes the unique value $\tilde\xi = 1/6$. Just the same value had the constant $\xi$ in quantum Hamiltonians arise from the traditional quantizations of the natural systems: the DeWitt canonical, Pauli-DeWitt quasiclassical, geometrical and Feynman ones, as well as in the revised Schr\"{o}dinger variational quantization. Thus, QP generated by mechanics is tightly related to non-minimality of the quantum scalar field. Meanwhile, an essential discrepancy exists between the non-relativistic QMs derived from the two altenative approaches: QFT generate a scalar QP, whereas various quantizations of natural mechanics, lead to PQs depending on choice of space coordinates as physical observables and non-vanishing even in the flat space if the coordinates are curvilinear. \\ ( http://arxiv.org/abs/1201.5806 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5831 Date: Fri, 27 Jan 2012 16:54:13 GMT (7kb) Title: Revisiting the charged BTZ metric in nonlinear electrodynamics Authors: S. Habib Mazharimousavi, M. Halilsoy and T. Tahamtan Categories: gr-qc Comments: 7 pages no figure \\ In contrast to its chargeless version the charged Banados, Taitelboim and Zanelli (BTZ) metric in linear Maxwell electromagnetism is known to be singular at r=0. We show, by employing nonlinear electrodynamics that one obtains charged, extension of the BTZ metric with regular electric field. This we do by choosing a logarithmic Lagrangian for the nonlinear electrodynamics. A Theorem is proved on the existence of electric black holes and combining this results with a duality principle disproves the existence of magnetic black holes in 2+1-dimensions. \\ ( http://arxiv.org/abs/1201.5831 , 7kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1110.2195 (*cross-listing*) Date: Mon, 10 Oct 2011 20:49:23 GMT (205kb,D) Date (revised v2): Thu, 19 Jan 2012 23:43:58 GMT (205kb,D) Title: Horava gravity vs. thermodynamics: the black hole case Authors: D. Blas and S. Sibiryakov Categories: hep-th gr-qc Comments: 36 pages, 3 figures, 1 table. v2 Small changes to agree with published version \\ Under broad assumptions breaking of Lorentz invariance in gravitational theories leads to tension with unitarity because it allows for processes that apparently violate the second law of thermodynamics. The crucial ingredient of this argument is the existence of black hole solutions with the interior shielded from infinity by a causal horizon. We study how the paradox can be resolved in the healthy extension of Horava gravity. To this aim we analyze classical solutions describing large black holes in this theory with the emphasis on their causal structure. The notion of causality is subtle in this theory due to the presence of instantaneous interactions. Despite this fact, we find that within exact spherical symmetry a black hole solution contains a space-time region causally disconnected from infinity by a surface of finite area -- the `universal horizon'. We then consider small perturbations of arbitrary angular dependence in the black hole background. We argue that aspherical perturbations destabilize the universal horizon and, at non-linear level, turn it into a finite-area singularity. The causal structure of the region outside the singularity is trivial. If the higher-derivative terms in the equations of motion smear the singularity while preserving the trivial causal structure of the solutions, the thermodynamics paradox would be obviated. As a byproduct of our analysis we prove that the black holes do not have any non-standard long-range hair. We also comment on the relation with Einstein-aether theory, where the solutions with universal horizon appear to be stable. \\ ( http://arxiv.org/abs/1110.2195 , 205kb) ------------------------------------------------------------------------------ \\ arXiv:1111.1435 (*cross-listing*) Date: Sun, 6 Nov 2011 16:47:32 GMT (12kb) Date (revised v2): Mon, 14 Nov 2011 14:15:27 GMT (12kb) Title: Tidal tensors in the description of gravity and electromagnetism Authors: Nicoleta Voicu ("Transilvania" University of Brasov, Romania) Categories: math-ph gr-qc math.DG math.MP Comments: submitted to: Journal of Nonlinear Mathematical Physics MSC-class: 53Z05, 53B05, 53B40, 53C60, 83C22 \\ In 2008-2009, F. Costa and C. Herdeiro proposed a new gravito-electromagnetic analogy, based on tidal tensors. We show that connections on the tangent bundle of the space-time manifold can help not only in finding a covnenient geometrization of their ideas, but also a common mathematical description of the main equations of gravity and electromagnetism. \\ ( http://arxiv.org/abs/1111.1435 , 12kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5697 (*cross-listing*) Date: Fri, 27 Jan 2012 04:23:31 GMT (368kb,D) Title: "Evaporation" of a flavor-mixed particle from a gravitational potential Authors: Mikhail V. Medvedev Categories: astro-ph.CO gr-qc hep-ph hep-th Comments: 8 pages, 1 figure Journal-ref: J. Phys. A: Math. Theor. 43 (2010) 372002 (7pp) DOI: 10.1088/1751-8113/43/37/372002 \\ We demonstrate that a stable particle with flavor mixing, confined in a gravitational potential can gradually and irreversibly escape -- or "evaporate" -- from it. This effect is due to mass eigenstate conversions which occur in interactions (scattering) of mass states with other particles even when the energy exchange between them is vanishing. The evaporation and conversion are quantum effects not related to flavor oscillations, particle decay, quantum tunneling or other well-known processes. Apart from their profound academic interest, these effects should have tremendous implications for cosmology, e.g., (1) the cosmic neutrino background distortion is predicted and (2) the softening of central cusps in dark matter halos and smearing out or destruction of dwarf halos were suggested. \\ ( http://arxiv.org/abs/1201.5697 , 368kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5738 (*cross-listing*) Date: Fri, 27 Jan 2012 10:25:26 GMT (12kb,D) Title: Effect of electromagnetic fields on the creation of scalar particles in a flat Robertson-Walker space-time Authors: S. Haouat and R. Chekireb Categories: hep-th gr-qc Comments: arXiv admin note: text overlap with arXiv:1108.0336 \\ The problem of particle creation from vacuum in a flat Robertson-Walker space-time in the presence of electromagnetic fields is studied. Two sets of exact solutions for the Klein Gordon equation with varying electric field and constant magnetic field are given. Then the canonical method based on Bogoliubov transformation is applied to calculate the pair creation probability and the density number of created particles. The particular case of radiation dominated universe is discussed. The vacuum to vacuum transition probability is calculated and the imaginary part of the effective action is extracted. It is shown that the electric field amplifies gravitational particle creation while the magnetic field minimizes it. \\ ( http://arxiv.org/abs/1201.5738 , 12kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5754 (*cross-listing*) Date: Fri, 27 Jan 2012 12:02:40 GMT (11kb) Title: Gravitational entropy and thermodynamics away from the horizon Authors: Ram Brustein, A.J.M. Medved Categories: hep-th gr-qc Comments: 16 pages Report-no: LMU-ASC 05/12 \\ We define, by an integral over a spherical shell, an invariant geometric entropy of a black brane in an asymptotically anti-de Sitter spacetime. This gravitational entropy can be formulated on a shell of arbitrary radius and reduces to Wald's Noether charge entropy at the horizon of the black brane. We give the entropy a thermodynamic interpretation by similarly defining a gravitational energy and pressure and support this interpretation by showing that, for some specific cases, the field theory duals of the entropy, energy and pressure are indeed the same as the corresponding quantities in the field theory. In this context, the Einstein equations are equivalent to the field theory thermodynamic relation TdS=dE+PdV supplemented by an equation of state. \\ ( http://arxiv.org/abs/1201.5754 , 11kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5755 (*cross-listing*) Date: Fri, 27 Jan 2012 12:06:48 GMT (224kb) Title: Localized Propagating Tachyons in Extended Relativity Theories Authors: Matej Pav\v{s}i\v{c} Categories: hep-th gr-qc hep-ph Comments: 22 pages, 3 figures \\ We examine the possibility of localized propagating tachyonic fields within a properly extended relativity. A possible extension is to include superluminal transformations and reference frames. This leads to complex 4D spacetime, or real 8D spacetime M_{4,4}. The mass shell constraint in M_{4,4} becomes, after first quantization, the ultrahyperbolic Klein-Gordon equation. The Cauchy problem for such equation is not well posed, because it is not possible to freely specify initial data on a 7D hypersurface of M_{4,4}. We explicitly demonstrate that it is possible to do it on a space-like 4-surface for bradyons, and on a time-like 4-surface for tachyons. But then the evolution of a bradyonic field into the four time-like directions, or the "evolution" of a tachyonic field into the four space-like directions, is not uniquely determined. We argue that this is perhaps no so bad, because in quantum field theory (after second quantization) the classical trajectories of fields are not determined anyway, and so it does not matter, if they are not completely determined already in the first quantized theory. A next possible extension of relativity is to consider 16D Clifford space, C, a space whose elements are oriented r-volumes, r=0,1,2,3,4 of real 4D spacetime. Then the evolution parameter can be associated with an extra light-cone coordinate, e.g., with the sum of the scalar and the psudoscalar coordinate, and initial data can be given on a light-light hypersurface, in which case the Cauchy problem is well posed. This procedure brings us to the Stueckelberg theory which contains localized propagating tachyons in 4D spacetime. \\ ( http://arxiv.org/abs/1201.5755 , 224kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5832 (*cross-listing*) Date: Fri, 27 Jan 2012 16:56:17 GMT (243kb) Title: Holographic repulsion and confinement in gauge theory Authors: Viqar Husain and Dawood Kothawala Categories: hep-th gr-qc Comments: 8 pages, 4 figures \\ We show that for asymptotically anti-deSitter backgrounds with negative energy, such as the AdS soliton and regulated negative mass AdS-Schwarzshild metrics, the Wilson loop expectation value in the AdS/CFT conjecture exhibits a Coulomb to confinement transition. We also show that the quark-antiquark ($q \bar q$) potential can be interpreted as affine time along null geodesics on the minimal string world sheet,and that its intrinsic curvature provides a signature of transition to confinement phase. The result demonstrates a UV/IR relation in that the boundary separation of the $q \bar{q}$ pair exhibits an inverse relationship with the radial descent of the world sheet into the bulk. Our results suggest a generic (holographic) relationship between confinement in gauge theory and repulsive gravity, which in turn is connected with singularity avoidance in quantum gravity. \\ ( http://arxiv.org/abs/1201.5832 , 243kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5850 (*cross-listing*) Date: Fri, 27 Jan 2012 18:01:48 GMT (47kb) Title: Non-linear corrections to Lagrangians predicted by causal set theory: Flat space bosonic toy model Authors: Roman Sverdlov Categories: physics.gen-ph gr-qc Comments: 58 pages, no figures \\ A while ago a proposal have been made regarding Klein Gordon and Maxwell Lagrangians for causal set theory. These Lagrangian densities are based on the statistical analysis of the behavior of field on a sample of points taken throughout some "small" region of spacetime. However, in order for that sample to be statistically reliable, a lower bound on the size of that region needs to be imposed. This results in "unwanted contributions" from higher order derivatives to the Lagrangian density, as well as non-trivial curvature effects on the latter. It turns out that both gravitational and non-gravitational effects end up being highly non-linear. In the previous papers we were focused on leading order terms, which allowed us to neglect these nonlinearities. We would now like to go to the next order and investigate them. In the current paper we will exclusively focus on the effects of higher order derivatives in the flat-space toy model. The gravitational effects will be studied in another paper which is currently in preparation. Both papers are restricted to bosonic fields, although the issue probably generalizes to fermions once Grassmann numbers are dealt with in appropriate manner. \\ ( http://arxiv.org/abs/1201.5850 , 47kb) ------------------------------------------------------------------------------ \\ arXiv:1201.5888 (*cross-listing*) Date: Fri, 27 Jan 2012 20:58:02 GMT (2455kb) Title: The evolution of massive black holes and their spins in their galactic hosts Authors: Enrico Barausse Categories: astro-ph.CO gr-qc Comments: 25 pages, 15 figures \\ [Abridged] [...] In this paper, we study the mass and spin evolution of massive black holes within a semianalytical galaxy-formation model that follows the evolution of dark-matter halos along merger trees, as well as that of the baryonic components (hot gas, stellar and gaseous bulges, and stellar and gaseous galactic disks). This allows us to study the mass and spin evolution of massive black holes in a self-consistent way, by taking into account the effect of the gas present in galactic nuclei both during the accretion phases and during mergers. Also, we present predictions, as a function of redshift, for the fraction of gas-rich black-hole mergers -- in which the spins prior to the merger are aligned due to the gravito-magnetic torques exerted by the circumbinary disk -- as opposed to gas-poor mergers, in which the orientation of the spins before the merger is roughly isotropic. These predictions may be tested by LISA or similar spaced-based gravitational-wave detectors such as eLISA/NGO or SGO. \\ ( http://arxiv.org/abs/1201.5888 , 2455kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1006.3543 (*cross-listing*) replaced with revised version Fri, 27 Jan 2012 15:44:44 GMT (68kb) Title: Unexplored regions in QFT and the conceptual foundations of the Standard Model Authors: Bert Schroer Categories: hep-th gr-qc math-ph math.MP Comments: 64 pages Latex, addition of new results improvement of presentation arXiv admin note: text overlap with arXiv:1012.0013 \\ ( http://arxiv.org/abs/1006.3543 , 68kb) ------------------------------------------------------------------------------ \\ arXiv:1103.5326 (*cross-listing*) replaced with revised version Fri, 27 Jan 2012 10:59:48 GMT (38kb) Title: Warped de Sitter compactifications Authors: Masato Minamitsuji, Kunihito Uzawa Categories: hep-th gr-qc Comments: 25 pages, 2 figures; v3: references added Journal-ref: JHEP 1201:142,2012 \\ ( http://arxiv.org/abs/1103.5326 , 38kb) ------------------------------------------------------------------------------ \\ arXiv:1107.3083 replaced with revised version Fri, 27 Jan 2012 16:58:27 GMT (14kb) Title: Existence and uniqueness of Bowen-York Trumpets Authors: G. Waxenegger, R. Beig, N.\'O Murchadha Categories: gr-qc Comments: This corresponds to the published version in Class. Quantum Grav. 28 (2011) 245002 Report-no: UWThPh-2011-23 MSC-class: 83Cxx Journal-ref: Class. Quantum Grav. 28 (2011) 245002 \\ ( http://arxiv.org/abs/1107.3083 , 14kb) ------------------------------------------------------------------------------ \\ arXiv:1109.1303 (*cross-listing*) replaced with revised version Fri, 27 Jan 2012 02:00:30 GMT (225kb) Title: Reconstruction of the interaction term between dark matter and dark energy using SNe Ia Authors: Freddy Cueva Solano and Ulises Nucamendi Categories: astro-ph.CO gr-qc Comments: 33 Pages, 8 Figures, 8 Tables \\ ( http://arxiv.org/abs/1109.1303 , 225kb) ------------------------------------------------------------------------------ \\ arXiv:1109.4254 (*cross-listing*) replaced with revised version Fri, 27 Jan 2012 16:34:42 GMT (17kb) Title: Topology and geometry of 6-dimensional (1,0) supergravity black hole horizons Authors: Mehmet Akyol, George Papadopoulos Categories: hep-th gr-qc math.DG Comments: 20 pages; minor corrections, some references added \\ ( http://arxiv.org/abs/1109.4254 , 17kb) ------------------------------------------------------------------------------ \\ arXiv:1112.0303 replaced with revised version Fri, 27 Jan 2012 19:41:31 GMT (90kb,D) Title: A Class of Effective Field Theory Models of Cosmic Acceleration Authors: Jolyon K. Bloomfield, Eanna E. Flanagan (Cornell University) Categories: gr-qc Comments: 44 pages, 2 figures; Version 2 significantly expanded, submitted to JCAP \\ ( http://arxiv.org/abs/1112.0303 , 90kb) ------------------------------------------------------------------------------ \\ arXiv:1112.4821 replaced with revised version Fri, 27 Jan 2012 20:29:46 GMT (615kb,D) Title: Self-consistent orbital evolution of a particle around a Schwarzschild black hole Authors: Peter Diener, Ian Vega, Barry Wardell, Steven Detweiler Categories: gr-qc Comments: 5 pages, 5 figures, submitted to PRL \\ ( http://arxiv.org/abs/1112.4821 , 615kb) ------------------------------------------------------------------------------ \\ arXiv:1201.3267 replaced with revised version Fri, 27 Jan 2012 12:23:58 GMT (38kb,D) Title: Fermion Quasi-normal modes of the Kerr Black-Hole Authors: W. A. Carlson, A. S. Cornell and B. Jordan Categories: gr-qc Comments: 13 pages, 1 figure Report-no: WITS-CTP-86 \\ ( http://arxiv.org/abs/1201.3267 , 38kb) ------------------------------------------------------------------------------ \\ arXiv:1201.4790 replaced with revised version Fri, 27 Jan 2012 17:00:01 GMT (184kb) Title: Interpreting spacetimes of any dimension using geodesic deviation Authors: Jiri Podolsky, Robert Svarc Categories: gr-qc hep-th Comments: 19 pages, 2 figures. To appear in Phys. Rev. D. The reference [125] added \\ ( http://arxiv.org/abs/1201.4790 , 184kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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/ For a list of archive mirror sites, see http://arXiv.org/servers.html ----------------------------------------------------------------------------- Third-party submissions cause excessive problems. Author self-submissions are exceedingly preferred. E-mail submissions have been discontinued in favor of better support for Web submissions. See http://arXiv.org/help/uploads