Beyond the Singularity of the 2-D Charged Black Hole

Details Beyond the Singularity of the 2-D Charged Black Hole Beyond the Singularity of the 2-D Charged Black Hole

2003-05-16

arxiv.org/abs/hep-th/0305140v3

JHEP0307:055,2003

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, 5 figures; v2: refs added, minor typos corrected; v3: references on the infinite blue shift at the inner horizon and

Scientific paper

10.1088/1126-6708/2003/07/055

Two dimensional charged black holes in string theory can be obtained as exact (SL(2,R)xU(1))/U(1) quotient CFTs. The geometry of the quotient is induced from that of the group, and in particular includes regions beyond the black hole singularities. Moreover, wavefunctions in such black holes are obtained from gauge invariant vertex operators in the SL(2,R) CFT, hence their behavior beyond the singularity is determined. When the black hole is charged we find that the wavefunctions are smooth at the singularities. Unlike the uncharged case, scattering waves prepared beyond the singularity are not fully reflected; part of the wave is transmitted through the singularity. Hence, the physics outside the horizon of a charged black hole is sensitive to conditions set behind the past singularity.

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