Time-dependent perturbations in two-dimensional String Black Holes

Details Time-dependent perturbations in two-dimensional String Black Holes Time-dependent perturbations in two-dimensional String Black Holes

1992-10-09

arxiv.org/abs/hep-th/9210055v1

Phys.Lett. B297 (1992) 67-73

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, two figures,UA-NPPS.9/92; CERN-TH.6671/92

Scientific paper

10.1016/0370-2693(92)91071-G

We discuss time-dependent perturbations (induced by matter fields) of a black-hole background in tree-level two-dimensional string theory. We analyse the linearized case and show the possibility of having black-hole solutions with time-dependent horizons. The latter exist only in the presence of time-dependent `tachyon' matter fields, which constitute the only propagating degrees of freedom in two-dimensional string theory. For real tachyon field configurations it is not possible to obtain solutions with horizons shrinking to a point. On the other hand, such a possibility seems to be realized in the case of string black-hole models formulated on higher world-sheet genera. We connect this latter result with black hole evaporation/decay at a quantum level.}

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