2D dilaton gravity in a unitary gauge

1992/11/18 by Aleksandar Miković, A. Mikovic
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #gr-qc #hep-th

paper · pdf · doi:10.1016/0370-2693(93)91402-9

published as Phys.Lett.B304:70-76,1993 · 12 pages, LaTex file, Imperial-TP/92-93/8 and QMW/PH/92/16

arxiv created 1992/11/18 · openalex publication_date 1993/04/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Reduced phase space formulation of CGHS model of 2d dilaton gravity is studied in en extrinsic time gauge. The corresponding Hamiltonian can be promoted into a Hermitian operator acting in the physical Hilbert space, implying a unitary evolution for the system. Consequences for the black hole physics are discussed. In particular, this manifestly unitary theory rules out the Hawking scenario for the endpoint of the black hole evaporation process.

Citations

• On particle creation by black holes
• Are horned particles the end point of Hawking evaporation?
• Evaporation of two-dimensional black holes
• Exactly solvable models of 2D dilaton quantum gravity
• Fock representations of the affine Lie algebraA 1 (1)
• QUANTUM GRAVITY IN TWO DIMENSIONS
• String theory and black holes