Archived weekly pre-prints 23-04-24

There is no new related paper today

[2304.10245] - Correction to Lagrangian for Bouncing Cosmologies in $f(Q)$ Gravity - Gaurav N. Gadbail, Ameya Kolhatkar, Sanjay Mandal, P.K. Sahoo
[2304.10367] - Black holes in quantum gravity - Daniel Harlow
[2304.09900] - Constraints on physical computers in holographic spacetimes - Aleksander M. Kubicki, Alex May, David Pérez-Garcia,
[2304.10155] - Towards quantum black hole microstates - Sunjin Choi, Seok Kim, Eunwoo Lee, Siyul Lee, Jaemo Park

There is no new related paper today

[2304.09714] - A background independent notion of causality - Antonio Capolupo, Aniello Quaranta

There is no new related paper today

[2304.08520] - Message in a bottle: energy extraction from bouncing geometries - Vitor Cardoso, João L. Costa, José Natário, Zhen Zhong
[2304.08624] - Effective description of generalized disformal theories - Kazufumi Takahashi, Masato Minamitsuji, Hayato Motohashi
[2304.08729] - Quantum atmosphere effective radii for different spin fields from quantum gravity inspired black holes - Douglas M. Gingrich
[2304.08831] - Energy extraction from rotating regular black hole via magnetic reconnection - Zhen Li, Xiao-Kan Guo, Faqiang Yuan
[2304.09014] - Micro-canonical and canonical description for generalised entropy - Shin’ichi Nojiri, Sergei D. Odintsov

There is no new related paper today

[2304.07383] - Excising Curvature Singularities from General Relativity - Alex Simpson
[2304.08478] - Wave Packets in AdS/CFT Correspondence - Seiji Terashima

Authors: Meysam Motaharfar, Parampreet Singh
Subjects: General Relativity and Quantum Cosmology (gr-qc)
Arxiv link: https://arxiv.org/abs/2304.06760
Abstract It was recently shown that tunneling wavefunction proposal is consistent with loop quantum geometry corrections including both holonomy and inverse scale factor corrections in the gravitational part of a spatially closed isotropic model with a positive cosmological constant. However, in presence of an inflationary potential the initial singularity is kinetic dominated and the effective minisuperspace potential again diverges at zero scale factor. Since the wavefunction in loop quantum cosmology cannot increase towards the zero scale factor, the tunneling wavefunction seems incompatible. We show that consistently including inverse scale factor modifications in scalar field Hamiltonian changes the effective potential into a barrier potential allowing the tunneling proposal. We also discuss a potential quantum instability of the cyclic universe resulting from tunneling.

Authors: Sen Yang, Wen-Di Guo, Qin Tan, Yu-Xiao Liu
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
Arxiv link: https://arxiv.org/abs/2304.06895
Abstract We study the axial gravitational quasinormal modes of a self-dual black hole in loop quantum gravity. Considering the axial perturbation of the background spacetime, we obtain the Schr"{o}dinger-like master equation. Then we calculate the quasinormal frequencies with the Wentzel-Kramers-Brillouin approximation and the asymptotic iteration method. We also investigate the numerical evolution of an initial wave packet on the self-dual black hole spacetime.~We find the quantum correction parameter $P$ positively affects the absolute values of both the real and imaginary parts of quasinormal frequencies. We derive the relation between the parameters of the circular null geodesics and quasinormal frequencies in the eikonal limit for the self-dual black hole, and numerically verify this relation.

There is no new related paper today

[2304.06740] - Black holes and hot shells in the Euclidean path integral approach to quantum gravity - José P. S. Lemos, O. B. Zaslavskii