Date: Thu, 31 Jan 13 01:08:44 GMT Subject: gr-qc daily 10 new + 5 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 Tue 29 Jan 13 21:00:00 GMT to Wed 30 Jan 13 21:00:00 GMT ------------------------------------------------------------------------------ \\ arXiv:1301.7068 Date: Tue, 29 Jan 2013 21:00:04 GMT (24kb) Title: Algebraically special perturbations of the Schwarzschild solution in higher dimensions Authors: Oscar J.C. Dias, Harvey S. Reall Categories: gr-qc hep-th Comments: 23 pages, no figures \\ We study algebraically special perturbations of a generalized Schwarzschild solution in any number of dimensions. There are two motivations. First, to learn whether there exist interesting higher-dimensional algebraically special solutions beyond the known ones. Second, algebraically special perturbations present an obstruction to the unique reconstruction of general metric perturbations from gauge-invariant variables analogous to the Teukolsky scalars and it is desirable to know the extent of this non-uniqueness. In four dimensions, our results generalize those of Couch and Newman, who found infinite families of time-dependent algebraically special perturbations. In higher dimensions, we find that the only regular algebraically special perturbations are those corresponding to deformations within the Myers-Perry family. Our results are relevant for several inequivalent definitions of "algebraically special". \\ ( http://arxiv.org/abs/1301.7068 , 24kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7074 Date: Tue, 29 Jan 2013 21:03:27 GMT (1082kb,D) Title: Gravitational and electromagnetic outputs from binary neutron star mergers Authors: Carlos Palenzuela, Luis Lehner, Marcelo Ponce, Steven L. Liebling, Matthew Anderson, David Neilsen, Patrick Motl Categories: gr-qc astro-ph.HE Comments: 5 pages, 4 figures \\ The late stage of an inspiraling neutron star binary gives rise to a strong emission of gravitational waves due to its highly dynamic, strong gravity. Interactions between the stellar magnetospheres, driven by the extreme dynamics, can produce considerable outflows. We study the gravitational and electromagnetic waves produced during the inspiral and merger of a binary neutron star system using a full general relativistic, resistive MHD evolution code. We show that the interaction between the stellar magnetospheres extracts kinetic energy from the system and powers radiative Poynting flux and heat dissipation. These features depend strongly on the configuration of the initial stellar magnetic moments. Our results indicate that this power can strongly outshine pulsars in binaries and has a distinctive angular and time-dependent pattern. \\ ( http://arxiv.org/abs/1301.7074 , 1082kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7089 Date: Tue, 29 Jan 2013 22:31:53 GMT (18kb,D) Title: Construction of the Conserved Non-linear Zeta via the Effective Action for Perfect Fluids Authors: Junpu Wang Categories: gr-qc hep-th Comments: 16 Pages \\ We consider the problem of how to construct the curvature perturbation $\zeta$ to nonlinear levels, which is expected to evolve time independently on super-horizon scales; in particular we concentrate on the situation where the universe is dominated by a perfect fluid. We have used a low energy/long wavelength effective action to model the fluid sector. Different from previous work, our approach assumes neither the absence of vector and tensor perturbations nor ``local homogeneity and isotropy''. As a corollary, we also show that the nonlinearly defined graviton field $\gamma_{ij}$ is conserved outside the horizon in the same manner as $\zeta$ is. \\ ( http://arxiv.org/abs/1301.7089 , 18kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7122 Date: Wed, 30 Jan 2013 02:12:44 GMT (303kb) Title: Static Spherically Symmetric Solution of the Einstein-aether Theory Authors: Changjun Gao and You-Gen Shen Categories: gr-qc Comments: 8 pages, 6 figures \\ We present the static spherically symmetric solution in the Einstein-aether theory by using of the Euler-Lagrange equations. The solution is similar to the Reissner-Nordstrom-de Sitter solution in that it has an inner Cauchy horizon, an outer black hole event horizon and a "cosmic horizon". But different from the Reissner-Nordstrom-de Sitter solution, its "cosmic horizon" locates not at some finite physical radius but at the spatial infinity. The resulting electric potential is regular in the whole spacetime except for the curvature singularity. On the other hand, the magnetic potential is divergent on both Cauchy horizon and the outer event horizon. \\ ( http://arxiv.org/abs/1301.7122 , 303kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7198 Date: Wed, 30 Jan 2013 11:10:29 GMT (1187kb) Title: Fractional Einstein-Hilbert Action Cosmology Authors: V.K. Shchigolev Categories: gr-qc Comments: 12 pages, 8 figures \\ We propose a new type of cosmological model derived from the fractional variational principle when it is applied to the gravitational sector of action functional. In contrast to the fractional cosmological model developed earlier by the author from a fractional total action, in our new model the continuity equation remains valid in its usual form. For this model, a lot of exact solutions are obtained from a specific ansatz which is proposed for the cosmological term in this paper. Several examples arising from the given variations of the Hubble parameter with time are provided. Besides, we suggest an original interpretation of the main equations for our model. It supposes that the effective cosmological term could arise as a result of kinematical induction through the non-zero Hubble parameter. With the help of particular example, we demonstrate how this approach could lead our model quite closer to the real behavior of the universe. \\ ( http://arxiv.org/abs/1301.7198 , 1187kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7201 Date: Wed, 30 Jan 2013 11:26:52 GMT (22kb) Title: Scalar field entanglement entropy for small Schwarzschild black hole Authors: Maksym Teslyk and Olena Teslyk Categories: gr-qc quant-ph Comments: 10 pages MSC-class: 83C57 \\ We consider scalar field entanglement entropy generated with black hole of (sub)planck mass scale thus implying the unitary evolution of gravity. The dependence on the dimension of the Hilbert space for degrees of freedom located behind the horizon is taken into account. The obtained results contain polylogarithmic terms. \\ ( http://arxiv.org/abs/1301.7201 , 22kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7206 Date: Wed, 30 Jan 2013 12:29:57 GMT (393kb) Title: Black hole spectroscopy from null geodesics Authors: Shao-Wen Wei, Yu-Xiao Liu, and Chun-E Fu Categories: gr-qc hep-th Comments: 12 pages, 3 figures, and one table \\ The quasinormal mode frequencies can be understood from the massless particles trapped at the unstable circular null geodesics and slowly leaking out to infinity. Base on this viewpoint, in this paper, we construct the quantum entropy spectrum of the stationary black holes from the null geodesics using the new physical interpretation of the quasinormal mode frequencies proposed by Maggiore. Following this idea, we calculate the spacing of the entropy spectrum for various types of black holes with or without the charge and spin in any dimension $d$ of the spacetime. The result shows that the spacing closely depends on the charge, spin, and the dimension of the spacetime. Moreover, for a black hole far from the extremal case, the spacing is found to be larger than $2\pi\hbar$ for $d=4$, while smaller than $2\pi\hbar$ for $d\geq 5$, which is very different from the result of the previous work by using the usual quasinormal mode frequencies, where the spacing of the entropy spectrum is $2\pi\hbar$ and is independent of the black hole parameters and dimension $d$. \\ ( http://arxiv.org/abs/1301.7206 , 393kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7291 Date: Wed, 30 Jan 2013 17:10:33 GMT (1171kb,D) Title: Probing dynamical spacetimes with gravitational waves Authors: Chris Van Den Broeck Categories: gr-qc Comments: 38 pages, 9 figures. Book chapter for the Springer Handbook of Spacetime (Springer Verlag, to appear in 2013) \\ This decade will see the first direct detections of gravitational waves by observatories such as Advanced LIGO and Virgo. Among the prime sources are coalescences of binary neutron stars and black holes, which are ideal probes of dynamical spacetime. This will herald a new era in the empirical study of gravitation. For the first time, we will have access to the genuinely strong-field dynamics, where low-energy imprints of quantum gravity may well show up. In addition, we will be able to search for effects which might only make their presence known at large distance scales, such as the ones that gravitational waves must traverse in going from source to observer. Finally, coalescing binaries can be used as cosmic distance markers, to study the large-scale structure and evolution of the Universe. With the advanced detector era fast approaching, concrete data analysis algorithms are being developed to look for deviations from general relativity in signals from coalescing binaries, taking into account the noisy detector output as well as the expectation that most sources will be near the threshold of detectability. Similarly, several practical methods have been proposed to use them for cosmology. We explain the state of the art, including the obstacles that still need to be overcome in order to make optimal use of the signals that will be detected. Although the emphasis will be on second-generation observatories, we will also discuss some of the science that could be done with future third-generation ground-based facilities such as Einstein Telescope, as well as with space-based detectors. \\ ( http://arxiv.org/abs/1301.7291 , 1171kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7312 Date: Wed, 30 Jan 2013 18:03:07 GMT (23kb) Title: Infrared Issues in Graviton Higgs Theory Authors: Srijit Bhattacharjee and Parthasarathi Majumdar Categories: gr-qc Comments: Proceedings of Thirteenth Marcel Grossmann Meeting, Stockholm, July, 2012. Based on arXiv:1210.0497 \\ We investigate the one-loop infrared behaviour of the effective potential in minimally coupled graviton Higgs theory in Minkowski background. The gravitational analogue of one loop Coleman Weinberg effective potential turns out to be complex, the imaginary part indicating an infrared instability. This instability is traced to a tachyonic pole in the graviton propagator for constant Higgs fields. Physical implications of this behaviour are studied. We also discuss physical differences between gauge theories coupled to Higgs fields and graviton Higgs theory. \\ ( http://arxiv.org/abs/1301.7312 , 23kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7348 Date: Wed, 30 Jan 2013 20:17:58 GMT (1396kb,D) Title: On the black hole from merging binary neutron stars: how fast can it spin? Authors: Wolfgang Kastaun and Filippo Galeazzi and Daniela Alic and Luciano Rezzolla and Jose A. Font Categories: gr-qc Comments: 4 pages, 2 figures \\ The merger of two neutron stars will in general lead to the formation of a torus surrounding a black hole whose rotational energy can be tapped to potentially power a short gamma-ray burst. We have studied the merger of equal-mass binaries with spins aligned with the orbital angular momentum to determine the maximum spin the black hole can reach. Our initial data consists of irrotational binaries to which we add various amounts of rotation to increase the total angular momentum. Although the initial data violates the constraint equations, the use of the constraint-damping CCZ4 formulation yields evolutions with violations smaller than those with irrotational initial data and standard formulations. Interestingly, we find that a limit of $J/M^2 \simeq 0.89$ exists for the dimensionless spin and that any additional angular momentum given to the binary ends up in the torus rather than in the black hole, thus providing another nontrivial example supporting the cosmic censorship hypothesis. \\ ( http://arxiv.org/abs/1301.7348 , 1396kb) %-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%-%- ------------------------------------------------------------------------------ \\ arXiv:1211.2618 (*cross-listing*) Date: Mon, 12 Nov 2012 13:57:17 GMT (411kb,D) Date (revised v2): Tue, 29 Jan 2013 08:51:44 GMT (590kb,D) Title: Just Renormalizable TGFT's on U(1)^d with Gauge Invariance Authors: Dine Ousmane Samary and Fabien Vignes-Tourneret Categories: hep-th gr-qc math-ph math.MP Comments: 33 pages, 22 figures. One added paragraph on the different notions of connectedness, preciser formulation of the proof of the power counting theorem, more general statements about traciality of tensor graphs Report-no: CIPMA-MPA/032/2012 \\ We study the polynomial Abelian or U(1)^d Tensorial Group Field Theories equipped with a gauge invariance condition in any dimension d. From our analysis, we prove the just renormalizability at all orders of perturbation of the phi^4_6 and phi^6_5 random tensor models. We also deduce that the phi^4_5 tensor model is super-renormalizable. \\ ( http://arxiv.org/abs/1211.2618 , 590kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7083 (*cross-listing*) Date: Tue, 29 Jan 2013 21:53:51 GMT (24kb) Title: Black Holes in Six-dimensional Conformal Gravity Authors: H. Lu, Y. Pang and C.N. Pope Categories: hep-th gr-qc Comments: 28 pages Report-no: MIFPA-13-03 \\ We study conformally-invariant theories of gravity in six dimensions. In four dimensions, there is a unique such theory that is polynomial in the curvature and its derivatives, namely Weyl-squared, and furthermore all solutions of Einstein gravity are also solutions of the conformal theory. By contrast, in six dimensions there are three independent conformally-invariant polynomial terms one could consider. There is a unique linear combination (up to overall scale) for which Einstein metrics are also solutions, and this specific theory forms the focus of our attention in this paper. We reduce the equations of motion for the most general spherically-symmetric black hole to a single 5th-order differential equation. We obtain the general solution in the form of an infinite series, characterised by 5 independent parameters, and we show how a finite 3-parameter truncation reduces to the already known Schwarzschild-AdS metric and its conformal scaling. We derive general results for the thermodynamics and the first law for the full 5-parameter solutions. We also investigate solutions in extended theories coupled to conformally-invariant matter, and in addition we derive some general results for conserved charges in cubic-curvature theories in arbitrary dimensions. \\ ( http://arxiv.org/abs/1301.7083 , 24kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7182 (*cross-listing*) Date: Wed, 30 Jan 2013 10:00:08 GMT (201kb,D) Title: On the Renormalization of the Effective Field Theory of Large Scale Structures Authors: Enrico Pajer and Matias Zaldarriaga Categories: astro-ph.CO gr-qc hep-ph hep-th Comments: 24 pages, 2 figures \\ Standard perturbation theory (SPT) for large-scale matter inhomogeneities is unsatisfactory for at least three reasons: there is no clear expansion parameter since the density contrast is not small on all scales; it does not fully account for deviations at large scales from a perfect pressureless fluid induced by short-scale non-linearities; for generic initial conditions, loop corrections are UV-divergent, making predictions cutoff dependent and hence unphysical. The Effective Field Theory of Large Scale Structures successfully addresses all three issues. Here we focus on the third one and show explicitly that the terms induced by integrating out short scales, neglected in SPT, have exactly the right scale dependence to cancel all UV-divergences at one loop, and this should hold at all loops. A particularly clear example is an Einstein deSitter universe with no-scale initial conditions P_in=A k^n. After renormalizing the theory, we use self-similarity to derive a very simple result for the final power spectrum for any n, excluding two-loop corrections and higher. We show how the relative importance of different corrections depend on n. For n=-1.5, relevant for our universe, pressure and dissipative corrections are more important than the two-loop corrections. \\ ( http://arxiv.org/abs/1301.7182 , 201kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7330 (*cross-listing*) Date: Wed, 30 Jan 2013 19:16:59 GMT (47kb) Title: The ontology of General Relativity Authors: Gustavo E. Romero Categories: physics.gen-ph gr-qc physics.hist-ph Comments: 20 pages, 1 figure, review article to be published in Mario Novello and Santiago E. Perez Bergliaffa (eds.) "Cosmology and Gravitation", Cambridge University Press, lecture notes of the BSCG XV \\ I discuss the ontological assumptions and implications of General Relativity. I maintain that General Relativity is a theory about gravitational fields, not about space-time. The latter is a more basic ontological category, that emerges from physical relations among all existents. I also argue that there are no physical singularities in space-time. Singular space-time models do not belong to the ontology of the world: they are not things but concepts, i.e. defective solutions of Einstein's field equations. I briefly discuss the actual implication of the so-called singularity theorems in General Relativity and some problems related to ontological assumptions of Quantum Gravity. \\ ( http://arxiv.org/abs/1301.7330 , 47kb) ------------------------------------------------------------------------------ \\ arXiv:1301.7352 (*cross-listing*) Date: Wed, 30 Jan 2013 20:41:42 GMT (265kb) Title: On propagators in de Sitter space Authors: Masafumi Fukuma, Yuho Sakatani, Sotaro Sugishita Categories: hep-th gr-qc Comments: 61 pages, 9 figures Report-no: KUNS-2432, MISC-2013-01 \\ In a spacetime with no global timelike Killing vector, we do not have a natural choice for the vacuum state of matter fields, leading to the ambiguity in defining the Feynman propagators. In this paper, choosing the vacuum state as the instantaneous ground state of the Hamiltonian at each moment, we develop a method for calculating wave functions associated with the vacuum and the corresponding in-in and in-out propagators. We apply this method to free scalar field theory in de Sitter space and obtain de Sitter invariant propagators in various coordinate patches. We show that the in-out propagator in the Poincare patch has a finite massless limit with the full de Sitter invariance preserved. We argue and numerically check that our in-out propagators coincide with those obtained by the path integral with the standard i\epsilon prescription. We also show that the in-out propagators satisfy Polyakov's composition principle. Several applications of our propagators are also discussed. \\ ( http://arxiv.org/abs/1301.7352 , 265kb) %%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%%--%% ------------------------------------------------------------------------------ \\ arXiv:1102.2999 (*cross-listing*) replaced with revised version Wed, 30 Jan 2013 10:00:09 GMT (461kb) Title: Large isoperimetric surfaces in initial data sets Authors: Michael Eichmair and Jan Metzger Categories: math.DG gr-qc Comments: 29 pages. All comments welcome! This is the final version to appear in J. Differential Geom \\ ( http://arxiv.org/abs/1102.2999 , 461kb) ------------------------------------------------------------------------------ \\ arXiv:1103.1373 (*cross-listing*) replaced with revised version Wed, 30 Jan 2013 19:44:36 GMT (472kb) Title: Causality-Violating Higgs Singlets at the LHC Authors: Chiu Man Ho and Thomas J. Weiler Categories: hep-ph gr-qc Comments: 53 pages, 5 figures, v3: version to appear in PRD, with discussions improved, references updated and typos fixed \\ ( http://arxiv.org/abs/1103.1373 , 472kb) ------------------------------------------------------------------------------ \\ arXiv:1111.3167 replaced with revised version Wed, 30 Jan 2013 17:58:09 GMT (1740kb,D) Title: Mimicking dark matter in galaxy clusters through a non-minimal gravitational coupling with matter Authors: Orfeu Bertolami, Pedro Fraz\~ao, Jorge P\'aramos Categories: gr-qc astro-ph.CO hep-ph Comments: 15 pages, 19 figures; published version Journal-ref: Phys. Rev. D 86, 044034 (2012) DOI: 10.1103/PhysRevD.86.044034 \\ ( http://arxiv.org/abs/1111.3167 , 1740kb) ------------------------------------------------------------------------------ \\ arXiv:1204.2125 replaced with revised version Wed, 30 Jan 2013 00:59:37 GMT (1733kb) Title: Numerical simulation of time delay interferometry for eLISA/NGO Authors: Gang Wang and Wei-Tou Ni Categories: gr-qc astro-ph.CO astro-ph.IM Comments: 17 pages, 13 figures, 3 tables, minor changes in description to match the accepted version of Classical and Quantum Gravity. arXiv admin note: text overlap with arXiv:1102.4965 \\ ( http://arxiv.org/abs/1204.2125 , 1733kb) ------------------------------------------------------------------------------ \\ arXiv:1204.5466 replaced with revised version Wed, 30 Jan 2013 18:35:13 GMT (13kb) Title: Tunneling during Quantum Collapse in AdS Spacetime Authors: Cenalo Vaz and Kinjalk Lochan Categories: gr-qc Comments: 14 pages. No figures. Title changed to published version Journal-ref: Phys. Rev. D 87, 024045 (2013) DOI: 10.1103/PhysRevD.87.024045 \\ ( http://arxiv.org/abs/1204.5466 , 13kb) ------------------------------------------------------------------------------ \\ arXiv:1206.3617 (*cross-listing*) replaced with revised version Tue, 29 Jan 2013 22:54:32 GMT (25kb) Title: Cosmology and perturbations in massive gravity Authors: Guido D'Amico Categories: hep-th astro-ph.CO gr-qc Comments: 17 pages. v2: references added, minor changes to match PRD published version DOI: 10.1103/PhysRevD.86.124019 \\ ( http://arxiv.org/abs/1206.3617 , 25kb) ------------------------------------------------------------------------------ \\ arXiv:1210.2778 (*cross-listing*) replaced with revised version Wed, 30 Jan 2013 12:50:48 GMT (7505kb,D) Title: Observing the Galaxy's massive black hole with gravitational wave bursts Authors: C. P. L. Berry and J. R. Gair Categories: astro-ph.HE astro-ph.CO astro-ph.GA astro-ph.IM gr-qc Comments: 25 pages, 17 figures, 1 appendix. One more typo fixed Journal-ref: MNRAS 429(1):589-612 (2013) DOI: 10.1093/mnras/sts360 \\ ( http://arxiv.org/abs/1210.2778 , 7505kb) ------------------------------------------------------------------------------ \\ arXiv:1211.4992 replaced with revised version Wed, 30 Jan 2013 09:21:57 GMT (82kb) Title: Multidimensional gravitational model with anisotropic pressure Authors: O. A. Grigorieva, G. S. Sharov Categories: gr-qc Comments: 8 pages, 6 figures \\ ( http://arxiv.org/abs/1211.4992 , 82kb) ------------------------------------------------------------------------------ \\ arXiv:1212.6029 (*cross-listing*) replaced with revised version Wed, 30 Jan 2013 15:54:36 GMT (489kb,D) Title: Cosmological Backreaction for a Test Field Observer in a Chaotic Inflationary Model Authors: Giovanni Marozzi, Gian Paolo Vacca, Robert H. Brandenberger Categories: hep-th astro-ph.CO gr-qc hep-ph Comments: 15 pages, 4 figures. A comment added, typos corrected, version accepted for publication in JCAP \\ ( http://arxiv.org/abs/1212.6029 , 489kb) ------------------------------------------------------------------------------ \\ arXiv:1301.5103 replaced with revised version Wed, 30 Jan 2013 11:06:32 GMT (22kb) Title: High-temperature expansion of the one-loop free energy of a scalar field on a curved background Authors: I. S. Kalinichenko, P. O. Kazinski Categories: gr-qc hep-th Comments: 25 pages;some comments and references added \\ ( http://arxiv.org/abs/1301.5103 , 22kb) ------------------------------------------------------------------------------ \\ arXiv:1301.5558 replaced with revised version Wed, 30 Jan 2013 18:30:26 GMT (76kb) Title: Different representations of the Levi-Civita Bertotti Robinson solution Authors: Oyvind Gron and Steinar Johannesen Categories: gr-qc Comments: 54 pages, 9 figures. In the new version we have rewritten section 4.VI and added four new references \\ ( http://arxiv.org/abs/1301.5558 , 76kb) ------------------------------------------------------------------------------ \\ arXiv:1301.6650 replaced with revised version Wed, 30 Jan 2013 07:30:34 GMT (9kb) Title: How to kill the Unruh effect Authors: Ion I. Cotaescu Categories: gr-qc hep-th \\ ( http://arxiv.org/abs/1301.6650 , 9kb) %%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%---%%%--- 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. 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