Information is Not Lost in the Evaporation of 2-dimensional Black Holes

Details Information is Not Lost in the Evaporation of 2-dimensional Black Holes Information is Not Lost in the Evaporation of 2-dimensional Black Holes

2008-01-11

arxiv.org/abs/0801.1811v2

Phys.Rev.Lett.100:211302,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.100.211302

We analyze Hawking evaporation of the Callen-Giddings-Harvey-Strominger (CGHS) 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)future null infinity of the quantum space-time is sufficiently long for the 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.

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