Islands in asymptotically flat 2D gravity

Hartman, Thomas; Shaghoulian, Edgar; Strominger, Andrew

doi:10.1007/JHEP07(2020)022

Islands in asymptotically flat 2D gravity

Journal Article · Fri Jul 03 00:00:00 EDT 2020 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP07(2020)022· OSTI ID:1646652

Hartman, Thomas ^[1]; ^[2]; Strominger, Andrew ^[3]

Cornell Univ., Ithaca, NY (United States). Dept. of Physics; OSTI
Cornell Univ., Ithaca, NY (United States). Dept. of Physics
Harvard Univ., Cambridge, MA (United States). Dept. of Physics

The large-$$\textit{N}$$ limit of asymptotically flat two-dimensional dilaton gravity coupled to $$\textit{N}$$ free matter fields provides a useful toy model for semiclassical black holes and the information paradox. Analyses of the asymptotic information flux as given by the entanglement entropy show that it follows the Hawking curve, indicating that information is destroyed in these models. Recently, motivated by developments in AdS/CFT, a semiclassical island rule for entropy has been proposed. We define and compute the island rule entropy for black hole formation and evaporation in the large-$$\textit{N}$$ RST model of dilaton gravity and show that, in contrast, it follows the unitary Page curve. The relation of these two observations, and interesting properties of the dilaton gravity island rule, are discussed.

View Accepted Manuscript (DOE)

Research Organization:: Cornell Univ., Ithaca, NY (United States); Harvard Univ., Cambridge, MA (United States)

Sponsoring Organization:: Gordon and Betty and Moore Foundation; John Templeton Foundation; Simons Foundation; USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0007870; SC0014123

OSTI ID:: 1646652

Journal Information:: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 7 Vol. 2020; ISSN 1029-8479

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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