Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Chethan Krishnan"'
Autor:
Abir Ghosh, Chethan Krishnan
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 6, Pp 1-52 (2024)
Abstract Defining finite entanglement entropy for a subregion in quantum field theory requires the introduction of two logically independent scales: an IR scale that controls the size of the subregion, and a UV cut-off. In AdS/CFT, the IR scale is th
Externí odkaz:
https://doaj.org/article/d848880b82df40ea8c472fa8fcb2a824
Autor:
Chethan Krishnan, Vyshnav Mohan
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-34 (2024)
Abstract Opinion is divided about the nature of state dependence in the black hole interior. Some argue that it is a necessary feature, while others argue it is a bug. In this paper, we consider the extended half-sided modular translation U (s 0) (wi
Externí odkaz:
https://doaj.org/article/4bd5330dbca34c9a8587c5f49429ea4d
Autor:
Chethan Krishnan, Pradipta S. Pathak
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-55 (2024)
Abstract In 1984, ’t Hooft famously used a brickwall (aka stretched horizon) to compute black hole entropy up to a numerical pre-factor. This calculation is sometimes interpreted as due to the entanglement of the modes across the horizon, but more
Externí odkaz:
https://doaj.org/article/1094ae0db4264e8da83fafe166deddf2
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-33 (2024)
Abstract Recent observations on type III algebras in AdS/CFT raise the possibility that smoothness of the black hole horizon is an emergent feature of the large-N limit. In this paper, we present a bulk model for the finite-N mechanism underlying thi
Externí odkaz:
https://doaj.org/article/2cdacaf471344b93b390fb4e89dd08c4
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 1, Pp 1-15 (2024)
Abstract We discuss conditions under which a deterministic sequence of real numbers, interpreted as the set of eigenvalues of a Hamiltonian, can exhibit features usually associated to random matrix spectra. A key diagnostic is the spectral form facto
Externí odkaz:
https://doaj.org/article/1e0ba4a0c21e441d8ccda1d37e4f53e5
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 10, Pp 1-27 (2023)
Abstract Black holes are believed to have the fast scrambling properties of random matrices. If the fuzzball proposal is to be a viable model for quantum black holes, it should reproduce this expectation. This is considered challenging, because it is
Externí odkaz:
https://doaj.org/article/35c100664e724780928ff42f4f8f2f5e
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 9, Pp 1-6 (2023)
Abstract We show that the Friedmann–Lemaître–Robertson–Walker (FLRW) framework has an instability towards the growth of fluid flow anisotropies, even if the Universe is accelerating. This flow (tilt) instability in the matter sector is invisib
Externí odkaz:
https://doaj.org/article/862c628328bf4629ac8420ffdca6fce8
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 1, Pp 1-33 (2023)
Abstract We consider a black hole with a stretched horizon as a toy model for a fuzzball microstate. The stretched horizon provides a cut-off, and therefore one can determine the normal (as opposed to quasi-normal) modes of a probe scalar in this geo
Externí odkaz:
https://doaj.org/article/a9162ac2f6364579bb13d3912f558704
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 12, Pp 1-55 (2022)
Abstract We discuss various aspects of HKLL bulk reconstruction for the free scalar field in AdS d+1. First, we consider the spacelike reconstruction kernel for the non-normalizable mode in global coordinates. We construct it as a mode sum. In even b
Externí odkaz:
https://doaj.org/article/168f67187db546f5a61c3a185ee679f0
Autor:
Kausik Ghosh, Chethan Krishnan
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-21 (2021)
Abstract We present a doubly holographic prescription for computing entanglement entropy on a gravitating brane. It involves a Ryu-Takayanagi surface with a Dirichlet anchoring condition. In braneworld cosmology, a related approach was used previousl
Externí odkaz:
https://doaj.org/article/1d4b1b7b754d4fe1b572dfed2d824774