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Information is Not Lost in the Evaporation of 2D Black Holes

Abhay Ashtekar, Victor Taveras, and Madhavan Varadarajan
Phys. Rev. Lett. 100, 211302 – Published 27 May 2008

Abstract

We analyze Hawking evaporation of the Callan-Giddings-Harvey-Strominger black holes from a quantum geometry perspective and show that information is not lost, primarily because the quantum space-time is sufficiently larger than the classical. Using suitable approximations to extract physics from quantum space-times we establish that (i) the future null infinity of the quantum space-time is sufficiently long for the past vacuum to evolve to a pure state in the future, (ii) this state has a finite norm in the future Fock space, and (iii) all the information comes out at future infinity; there are no remnants.

  • Figure
  • Figure
  • Received 10 January 2008

DOI:https://doi.org/10.1103/PhysRevLett.100.211302

©2008 American Physical Society

Authors & Affiliations

Abhay Ashtekar1,2,*, Victor Taveras1,†, and Madhavan Varadarajan2,1,‡

  • 1Institute for Gravitation and the Cosmos and Physics Department, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
  • 2Raman Research Institute, Bangalore, 560 080 India

  • *ashtekar@gravity.psu.edu
  • victor@gravity.psu.edu
  • madhavan@rri.res.in

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Issue

Vol. 100, Iss. 21 — 30 May 2008

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