Why the Entropy of a Black Hole is A/4?
Frolov, Valeri P.
Original · EN
A black hole considered as a part of a thermodynamical system possesses the Bekenstein-Hawking entropy Sₕ =Aₕ /(4lP²), where Aₕ is the area of a black hole surface and lP is the Planck length. Recent attempts to connect this entropy with dynamical degrees of freedom of a black hole generically did not provide the universal mechanism which allows one to obtain this exact value. We discuss the relation between the 'dynamical' contribution to the entropy and Sₕ, and show that the universality of Sₕ is restored if one takes into account that the parameters of the internal dynamical degrees of freedom as well as their number depends on the black hole temperature.
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