arXiv: General Relativity and Quantum Cosmology最新文献_第7页

N=1 Supergravity with loop quantum gravity methods and quantization of the SUSY constraint N=1环量子引力方法的超引力和SUSY约束的量子化

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-30 DOI: 10.1103/PHYSREVD.103.046010

K. Eder, H. Sahlmann

引用次数: 4

Tidal Love numbers of Kerr black holes 克尔黑洞的潮汐爱数

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-29 DOI: 10.1103/PHYSREVD.103.084021

A. Le Tiec, M. Casals, Edgardo Franzin

{"title":"Tidal Love numbers of Kerr black holes","authors":"A. Le Tiec, M. Casals, Edgardo Franzin","doi":"10.1103/PHYSREVD.103.084021","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.084021","url":null,"abstract":"The open question of whether a Kerr black hole can become tidally deformed or not has profound implications for fundamental physics and gravitational-wave astronomy. We consider a Kerr black hole embedded in a weak and slowly varying, but otherwise arbitrary, multipolar tidal environment. By solving the static Teukolsky equation for the gauge-invariant Weyl scalar $psi_0$, and by reconstructing the corresponding metric perturbation in an ingoing radiation gauge, for a general harmonic index $ell$, we compute the linear response of a Kerr black hole to the tidal field. This linear response vanishes identically for a Schwarzschild black hole and for an axisymmetric perturbation of a spinning black hole. For a nonaxisymmetric perturbation of a spinning black hole, however, the linear response does not vanish, and it contributes to the Geroch-Hansen multipole moments of the perturbed Kerr geometry. As an application, we compute explicitly the rotational black hole tidal Love numbers that couple the induced quadrupole moments to the quadrupolar tidal fields, to linear order in the black hole spin, and we introduce the corresponding notion of tidal Love tensor. Finally, we show that those induced quadrupole moments are closely related to the well-known physical phenomenon of tidal torquing of a spinning body interacting with a tidal gravitational environment.","PeriodicalId":8455,"journal":{"name":"arXiv: General Relativity and Quantum Cosmology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83900420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 49

Quantum Scattering Process and Information Transfer Out of a Black Hole 量子散射过程与黑洞外的信息传递

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-29 DOI: 10.5506/APhysPolB.52.805

V. Emelyanov, F. Klinkhamer

引用次数: 0

Extensions of the Penrose inequality with angular momentum 带角动量的Penrose不等式的推广

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-29 DOI: 10.1103/PHYSREVD.103.064025

Wojciech Kulczycki, E. Malec

引用次数: 1

Algorithm for time-delay interferometry numerical simulation and sensitivity investigation 延时干涉测量算法的数值模拟及灵敏度研究

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-29 DOI: 10.1103/PhysRevD.103.122006

Gang Wang, W. Ni, W. Han, C. Qiao

{"title":"Algorithm for time-delay interferometry numerical simulation and sensitivity investigation","authors":"Gang Wang, W. Ni, W. Han, C. Qiao","doi":"10.1103/PhysRevD.103.122006","DOIUrl":"https://doi.org/10.1103/PhysRevD.103.122006","url":null,"abstract":"In this work, we introduce a generic algorithm to numerically determine the time delays and spacecraft positions for a time-delay interferometry (TDI) channel in the dynamical case, and streamline the calculations by implementing an SC layout-time delay diagram. We select 11 second-generation TDI channels constructed from four approaches and evaluate their performances including gravitational wave responses, noise levels, and averaged sensitivities under a numerical LISA orbit. The results show that the interference paths of selected TDI channels are well matched and the laser frequency noise should be suppressed under the secondary noise. The channels show various sensitivities in the range of [0.1 mHz, 0.3 Hz], and the major differences appear in the frequency region lower than 20 mHz. The optimal channel A$_2$ or E$_2$ combined from second-generation Michelson TDI channels (X$_1$, X$_2$, and X$_3$) achieves the best sensitivity in the selected channels for the frequency lower than 50 mHz, while the Sagnac $alpha_1$ channel shows the worse sensitivity. Multiple channels show better sensitivities at some characteristic frequencies compared to the fiducial X$_1$ channel. The Michelson-type channels would have identical sensitivities considering noise level changes with the GW response. The joint $mathrm{A_2+E_2+T_2}$ observation not only enhances the sensitivity of the X$_1$ channel by a factor of $sqrt{2}$ to 2 but also improves the capacity of sky coverage.","PeriodicalId":8455,"journal":{"name":"arXiv: General Relativity and Quantum Cosmology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90771657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Pure polarization test of GW170814 and GW170817 using waveforms consistent with modified theories of gravity GW170814和GW170817的纯偏振测试，使用符合修正重力理论的波形

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-27 DOI: 10.1103/PHYSREVD.103.064037

H. Takeda, S. Morisaki, A. Nishizawa

{"title":"Pure polarization test of GW170814 and GW170817 using waveforms consistent with modified theories of gravity","authors":"H. Takeda, S. Morisaki, A. Nishizawa","doi":"10.1103/PHYSREVD.103.064037","DOIUrl":"https://doi.org/10.1103/PHYSREVD.103.064037","url":null,"abstract":"The physical degrees of freedom of a gravitational wave (GW) are imprints of the nature of gravity. We can test a gravity theory by searching for polarization modes beyond general relativity. The LIGO-Virgo collaboration analyzed several GW events in the O1 and O2 observing runs in the pure polarization framework, where they perform the Bayesian model selection between general relativity and the theory allowing only scalar or vector polarization modes. In this paper, we reanalyze the polarizations of GW170814 (binary black hole merger) and GW170817 (binary neutron star merger) in the improved framework of pure polarizations including the angular patterns of nontensorial radiation. We find logarithms of the Bayes factors of 2.775 and 3.636 for GW170814 in favor of the pure tensor polarization against pure vector and scalar polarizations, respectively. These Bayes factors are consistent with the previous results by the LIGO-Virgo collaboration, though the estimated parameters of the binaries are significantly biased. For GW170817 with the priors on the location of the binary from NGC4993, we find logarithms of the Bayes factors of 21.078 and 44.544 in favor of the pure tensor polarization against pure vector and scalar polarizations, respectively. These more strongly support GR, epecially compared to the scalar polarization, than the previous results by the LIGO-Virgo collaboration due to the location prior. In addition, by utilizing the orientation information of the binary from a gamma-ray burst jet, we find logarithms of the Bayes factor of 51.043 and 60.271 in favor of the pure tensor polarization against pure vector and pure scalar polarization, much improved from those without the jet prior.","PeriodicalId":8455,"journal":{"name":"arXiv: General Relativity and Quantum Cosmology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83189026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Analyzing conserved currents in F(R) theory of gravity 重力F(R)理论中守恒电流的分析

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-26 DOI: 10.1142/s021988782150050x

Nayem Sk., Manas Chakrabortty, A. Sanyal

引用次数: 2

Cavitation model of the inflationary stage of Big Bang 大爆炸暴胀阶段的空化模型

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-26 DOI: 10.1063/5.0035458

M. Shneider, M. Pekker

引用次数: 3

Black holes and wormholes in the Einstein-scalar-Gauss-Bonnet generalized theories of gravity 爱因斯坦-标量-高斯-邦尼广义引力理论中的黑洞和虫洞

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-25 DOI: 10.26268/HEAL.UOI.10354

A. Bakopoulos

{"title":"Black holes and wormholes in the Einstein-scalar-Gauss-Bonnet generalized theories of gravity","authors":"A. Bakopoulos","doi":"10.26268/HEAL.UOI.10354","DOIUrl":"https://doi.org/10.26268/HEAL.UOI.10354","url":null,"abstract":"In this Ph.D. dissertation we study the emergence of black-hole and wormhole solutions in the framework of the Einstein-scalar-Gauss-Bonnet (EsGB) theory. Particularly we study a family of theories where the coupling function $f(phi)$ between the scalar field of the theory and the quadratic Gauss-Bonnet gravitational term has an arbitrary form. At first, we analytically derive that the aforementioned family of theories may evade the constraints imposed by Bekenstein's No-Scalar Hair theorems and new solutions for black holes may be found. Then, using numerical integration methods we find solutions for black holes for many different forms of the coupling function. Also we derive their physical characteristics namely their mass, scalar charge, horizon area and entropy as well. Subsequently, by introducing a cosmological constant in the theory we investigate the existence of novel black-hole solutions. Specifically, assuming that the cosmological constant may be positive or negative we find numerical solutions which are asymptotically de Sitter or anti-de Sitter. In addition, as in the case of the asymptotically flat black holes, for each case we derive their physical characteristics. Finally, in the framework of the EsGB theory we derive novel wormhole solutions. The Gauss-Bonnet wormholes are traversable, may have a single or a double throat and do not demand the existence of exotic matter.","PeriodicalId":8455,"journal":{"name":"arXiv: General Relativity and Quantum Cosmology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84708057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Fully developed relativistic turbulence 完全发展的相对论性湍流

arXiv: General Relativity and Quantum Cosmology Pub Date : 2020-10-24 DOI: 10.1103/PHYSREVD.103.056018

E. Calzetta

引用次数: 9