On the Entropy of a Quantum Field in the 2 + 1 Dimensional Spinning Black Holes
Min-Ho Lee, Hyeong-Chan Kim, Jae Kwan Kim
Abstract
We calculate the entropy of a scalar field in a rotating black hole in 2 + 1 dimension. In the Hartle-Hawking state the entropy is proportional to the horizon area, but diverges linearly in h, where h is the radial cut-off. In WKB approximation the superradiant modes do not contribute to the entropy.
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