A possible explanation of the clash for black hole entropy in the extremal limit

Details A possible explanation of the clash for black hole entropy in the extremal limit A possible explanation of the clash for black hole entropy in the extremal limit

1997-11-24

arxiv.org/abs/gr-qc/9711071v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, Latex, no figures

Scientific paper

It is shown that the classical entropy of the extremal black hole depends on two different limits procedures. If we first take the extremal limit and then the boundary limit, the entropy is zero; if we do it the other way round, we get the Bekenstein-Hawking entropy. By means of the brick wall model, the quantum entropy of scalar field in the extremal black hole background has been calculated for the above two different limits procedures. A possible explanation which considers the quantum effect for the clash of black hole entropy in the extremal limit is given.

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