Issue
EPL
Volume 85, Number 3, February 2009
Article Number 30007
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/85/30007
Published online 13 February 2009
EPL, 85 (2009) 30007
DOI: 10.1209/0295-5075/85/30007

Quantum radiation of general nonstationary black holes

Jia-Chen Hua1, 2 and Yong-Chang Huang1, 3

1   Institute of Theoretical Physics, Beijing University of Technology - Beijing 100022, China
2   Department of Physics, New Mexico State University - Las Cruces, NM 88003-8001, USA
3   CCAST (World Laboratory) - P. O. Box 8730, Beijing, 100080, China

ychuang@bjut.edu.cn

received 20 November 2008; accepted in final form 15 January 2009; published February 2009
published online 13 February 2009

Abstract
Quantum radiation of general nonstationary black holes is investigated by using the method of generalized tortoise-coordinate transformation (GTT). It is shown in general that the temperature and the shape of the event horizon of this kind of black holes depend on time and angle. Further, we find that the chemical potential in the thermal-radiation spectrum is equal to the highest energy of the negative-energy state of particles in nonthermal radiation for general nonstationary black holes.

PACS
04.70.Dy - Quantum aspects of black holes, evaporation, thermodynamics.

© EPLA 2009