Entropy of Neutrino Field in Kerr-Newman-de Sitter Space-time

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2003,（5）
• 页码范围: 618-621
• 页数: 4页
• 语种: 英文

摘要

By using the improved brick wall model, we regard the two null horizons in Kerr-Newman-de Sitter space-time as two independent thermal equilibrium systems and we calculate the entropies of both horizons due to neutrino field. We propose that the so-called "superradiant" modes cannot be considered because fermion fields does not display supperradiance. In fact, the nonsuperradiant part does exactly show the expected area-law entropy.Moreover, our cut-off ε, which does not require an angular cut-off, is independent of angle θ.