Quantum-corrected ultraextremal horizons and validity of WKB in massless limit

Details Quantum-corrected ultraextremal horizons and validity of WKB in massless limit Quantum-corrected ultraextremal horizons and validity of WKB in massless limit

2007-03-25

arxiv.org/abs/gr-qc/0703120v1

Phys.Rev.D75:084018,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

revtex4, 9 pages

Scientific paper

10.1103/PhysRevD.75.084018

We consider quantum backreaction of the quantized scalar field with an arbitrary mass and curvature coupling on ultraextremal horizons. The problem is distinguished in that (in contrast to non-extremal or extremal black holes) the WKB approximation remains valid near $r_{+}$ (which is the radius of the horizon) even in the massless limit. We examine the behavior of the stress-energy tensor of the quantized field near $r_{+}$ and show that quantum-corrected objects under discussion do exist. In the limit of the large mass our results agree with previous ones known in literature.

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