Hawking and Unruh effects of the cosmological horizon in a higher-dimensional Kerr-de Sitter spacetime by the global embedding approach
Institute of theoretical physics and department of Physics, Shanxi Datong University - Datong 037009, China
Accepted: 11 April 2011
With appropriately chosen parameters, there exist the black-hole horizon and the cosmological horizon in the higher-dimensional Kerr-de Sitter spacetime, where these two horizons generally have different Hawking temperatures. In this letter we first reduce the higher-dimensional Kerr-de Sitter spacetime line element to a 2-dimensional one (the (t−r) sector) using the dimensional reduction method near the cosmological horizon, and then investigate the Unruh/Hawking effects of the cosmological horizon by the global embedding approach.
PACS: 04.70.Dy – Quantum aspects of black holes, evaporation, thermodynamics / 04.62.+v – Quantum fields in curved spacetime
© EPLA, 2011