New divergences of tachyon in the two-dimensional charged black holes

Abstract

We quantize the tachyon field in the two-dimensional (2D), $\epsilon <2$ charged black holes where $\epsilon$ is the dilaton coupling parameter for the Maxwell term. Especially the expectation value of the stress-energy tensor $⟨T_{ab}⟩$, observed by a freely falling observer, is computed. This shows that new divergences such as $\ln f$ and $\frac{1}{f}$ arises near the horizon ($f\to 0$), compared with conformal matter case.

10 pages no figure, RevTeX

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• Bogoliubov Coefficients of 2D Charged Black Holes
• Absorption of fixed scalar in scattering off 4D N=4 black holes