Mirror effect induced by the dilaton field on the Hawking radiation

Details Mirror effect induced by the dilaton field on the Hawking radiation Mirror effect induced by the dilaton field on the Hawking radiation

2005-02-14

arxiv.org/abs/hep-th/0502118v1

Class.Quant.Grav. 23 (2006) 1571-1584

Physics

High Energy Physics

High Energy Physics - Theory

15 pages

Scientific paper

10.1088/0264-9381/23/5/009

We discuss the string creation in the near-extremal NS1 black string solution. The string creation is described by an effective field equation derived from a fundamental string action coupled to the dilaton field in a conformally invariant manner. In the non-critical string model the dilaton field causes a timelike mirror surface outside the horizon when the size of the black string is comparable to the Planck scale. Since the fundamental strings are reflected by the mirror surface, the negative energy flux does not propagate across the surface. This means that the evaporation stops just before the naked singularity of the extremal black string appears even though the surface gravity is non-zero in the extremal limit.

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