Two-dimensional dilaton gravity in a unitary gauge

Details Two-dimensional dilaton gravity in a unitary gauge Two-dimensional dilaton gravity in a unitary gauge

1992-11-18

arxiv.org/abs/hep-th/9211082v1

Phys.Lett.B304:70-76,1993

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, LaTex file, Imperial-TP/92-93/8 and QMW/PH/92/16

Scientific paper

10.1016/0370-2693(93)91402-9

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.

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