https://doi.org/10.1140/epjc/s10052-009-1044-9
Regular Article - Theoretical Physics
Corrections to Hawking-like radiation for a Friedmann–Robertson–Walker universe
Institute of Theoretical Physics, Lanzhou University, Lanzhou, 730000, China
* e-mail: zhut05@lzu.cn
Received:
14
February
2009
Revised:
22
April
2009
Published online:
16
May
2009
Recently, a Hamilton–Jacobi method beyond the semiclassical approximation in black hole physics was developed by Banerjee and Majhi. We generalize their analysis of black holes to the case of a Friedmann–Robertson–Walker (FRW) universe. It is shown that all the higher order quantum corrections in the single particle action are proportional to the usual semiclassical contribution. The corrections to the Hawking-like temperature and entropy of the apparent horizon for the FRW universe are also obtained. In the corrected entropy, the area law involves a logarithmic area correction together with the standard term with the inverse power of the area.
PACS: 04.70.Dy –
© Springer-Verlag , 2009
