Thermal Hair of Quantum Black Hole
Y. Itoh, M. Hotta, T. Futamase, M. Morikawa

TL;DR
This paper explores how quantum thermal fluctuations near a two-dimensional black hole can produce quasi-bounded modes that contribute to black hole entropy, suggesting an additional form of thermal hair beyond the classical area law.
Contribution
It introduces a model where quantum-induced potential peaks create quasi-bounded modes, offering a new perspective on black hole entropy beyond traditional area law explanations.
Findings
Quasi-bounded modes are confined between potential peaks near the black hole.
These modes contribute to black hole entropy but do not follow the area law.
The modes can be interpreted as additional thermal hair of the quantum black hole.
Abstract
We investigate the possibility of statistical explanation of the black hole entropy by counting quasi-bounded modes of thermal fluctuation in two dimensional black hole spacetime. The black hole concerned is quantum in the sense that it is in thermal equilibrium with its Hawking radiation. It is shown that the fluctuation around such a black hole obeys a wave equation with a potential whose peaks are located near the black hole and which is caused by quantum effect. We can construct models in which the potential in the above sense has several positive peaks and there are quai-bounded modes confined between these peaks. This suggests that these modes contribute to the black hole entropy. However it is shown that the entropy associated with these modes dose not obey the ordinary area law. Therefore we can call these modes as an additional thermal hair of the quantum black hole.
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