Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-02-23
Phys.Lett. B424 (1998) 265-270
Physics
High Energy Physics
High Energy Physics - Theory
15 pages, Plain TeX, a shortened version will appear in Physics Letters B
Scientific paper
10.1016/S0370-2693(98)00226-3
We develop a simple scheme of quantization for the dilaton CGHS model without scalar fields, that uses the Gupta-Bleuler approach for the string fields. This is possible because the constraints can be linearized classically, due to positivity conditions that are present in the model (and not in the general string case). There is no ambiguity nor anomalies in the quantization. The expectation values of the metric and dilaton fields obey the classical requirements, thus exhibiting at the quantum level the Birkhoff theorem.
Alfaro Vittorio de
Cavaglia' Marco
Filippov Alexandre T.
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