nLab black hole information paradox

Contents

Idea

(…)

See also:

Critical discussion of the assumptions entering the statement of the paradox:

Robert B. Mann, Sebastian Murk, Daniel R. Terno: Paradoxes before the paradox: surface gravity and the information loss problem [arXiv:2109.13939]

Review aimed at readers with minimal background:

See also:

Anna Karlsson, Concerns about the replica wormhole derivation of the island conjecture (arXiv:2101.05879)
Harvendra Singh, Islands and Icebergs contribute nothing to the Page curve (System with a symmetrical bath) [arXiv:2210.13970]

Argument that the would-be proof of the island conjecture secretly works only for massive gravity:

Hao Geng, Andreas Karch, Massive Islands, J. High Energ. Phys. 2020 121 (2020) [doi:10.1007/JHEP09(2020)121, arXiv:2006.02438]
Hao Geng, Andreas Karch, Carlos Perez-Pardavila, Suvrat Raju, Lisa Randall, Marcos Riojas, Sanjit Shashi, Inconsistency of islands in theories with long-range gravity, J. High Energ. Phys. 2022 182 (2022) [doi:10.1007/JHEP01(2022)182]
Hao Geng, Graviton Mass and Entanglement Islands in Low Spacetime Dimensions [arXiv:2312.13336]

reviewed in:

Hao Geng, Recent Progress in Quantum Gravity: Karch-Randall Braneworld, Entanglement Islands and Graviton Mass, Washington (2022) [hdl:1773/49427]

and discussion of what to do about this problem:

Claim that the whole argument relies on the false assumption that the split property holds for quantum gravity:

Suvrat Raju, Failure of the split property in gravity and the information paradox, Classical and Quantum Gravity, 39 064002 [doi:10.1088/1361-6382/ac482b, arXiv:2110.05470]

Review in:

Nirmalya Kajuri, Of Islands, Holograms and Saving Quantum Physics From a Black Hole Paradox, Science – The Wire (Nov 2022)

$[\ldots]$ a few sceptics have argued that while the calculations are correct, they don’t help resolve the black hole information-loss paradox. The troubles stem from the reservoir attached to the anti-de Sitter universe. The physicists who authored the island papers assumed that gravity stopped at the boundary of the anti-de Sitter space and didn’t enter the reservoir. This is not an innocuous assumption. $[\ldots]$ The key takeaway is that the island way to recover information and save unitarity works perfectly well – if you slightly modify Einstein’s theory of gravity. These criticisms have been around for some two years now, and physicists are yet to resolve them in print. $[\ldots]$ physicists continue to publish papers by the hundreds about the entanglement islands but few attempt to answer whether the islands are compatible with the Einsteinian gravity of our universe. $[\ldots]$

See also:

Saskia Demulder, Alessandra Gnecchi, Ioannis Lavdas, Dieter Lüst, Islands and Light Gravitons in type IIB String Theory [arXiv:2204.03669]
Emil Martinec: “Thus far, picturesque evocations of quantum wormholes remain largely just that – picturesque evocations.” (2nd Nov 2022)

Argument that discussion of the issue in the toy example of 2d JT gravity does not actually generalize to higher dimensions:

Filip Landgren, Arvind Shekar, Islands and entanglement entropy in $d$ -dimensional curved backgrounds [arXiv:2401.01653]

Debate between a proponent and a critic :

Islands and Black Hole Information ft. Suvrat Raju and Geoff Penington, podcast at Theoretically Podcasting (9 Mar 2024) [YT]

See also:

Last revised on August 20, 2024 at 06:15:26. See the history of this page for a list of all contributions to it.