Radial geodesics as a microscopic origin of black hole entropy. III: Exercise with the Kerr-Newman black hole

We specify an angular motion on geodesics to reduce the problem to the case of radial motion elaborated in previous chapters. An appropriate value of entropy for a charged and rotating black hole is obtained by calculating the partition function on thermal geodesics confined under horizons. The quantum aggregation is classified in a similar way to the Reissner–Nordstrom black hole.