Entropy of spin fields in anti-de Sitter space-time

Using 't Hooft's brick-wall model, the quantum entropies of gravitational, electromagnetic, neutrino, and scalar fields on a Reissner-Nordstrom-anti-de Sitter space-time background are considered, and the effects of the spins of the fields on the entropy are investigated. It is shown that the entropy depends on the spins of the fields, the different fields obey different statistics and the contribution of the spins of the particles explicitly depends on its spin states.