caa a22 4500 463197186 CHVBK 20180406164926.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10773-006-9336-4 doi (NATIONALLICENCE)springer-10.1007/s10773-006-9336-4 Canonical Entropy of Reissner-Nordstrom Black Hole [Elektronische Daten] [Zhao Ren, Zhang Li-Chun, Zhang Sheng-Li] Recently, Hawking radiation of the black hole has been studied using the tunnel effect method. It is found the radiation spectrum of the black hole is not a strictly pure thermal spectrum. How the departure from pure thermal spectrum affects the entropy? This is a very interesting problem. In this paper, we calculate the partition function by energy spectrum obtained by tunnel effect. Using the relation between the partition function and entropy, we derive the expression of entropy the general charged black hole. In our calculation, we not only consider the correction to the black hole entropy due to fluctuation of energy but also consider the effect of the change of the black hole charges on entropy. We discuss Reissner-Nordstrom black hole and obtain that Reissner-Nordstrom black hole cannot approach the extreme black hole by changing its charges. Springer Science+Business Media, LLC, 2007 tunnel effect nationallicence canonical entropy nationallicence extreme black hole nationallicence Ren Zhao Department of Physics, Shanxi Datong University, 037009, Datong, P.R. China aut Li-Chun Zhang Department of Physics, Shanxi Datong University, 037009, Datong, P.R. China aut Sheng-Li Zhang Department of Applied Physics, Xi'an Jiaotong University, 710049, Xi'an, P.R. China aut International Journal of Theoretical Physics Springer US; http://www.springer-ny.com 46/8(2007-08-01), 2158-2167 0020-7748 46:8<2158 2007 46 10773 https://doi.org/10.1007/s10773-006-9336-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10773-006-9336-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ren Zhao Department of Physics, Shanxi Datong University, 037009, Datong, P.R. China aut NATIONALLICENCE 700 1- Li-Chun Zhang Department of Physics, Shanxi Datong University, 037009, Datong, P.R. China aut NATIONALLICENCE 700 1- Sheng-Li Zhang Department of Applied Physics, Xi'an Jiaotong University, 710049, Xi'an, P.R. China aut NATIONALLICENCE 773 0- International Journal of Theoretical Physics Springer US; http://www.springer-ny.com 46/8(2007-08-01), 2158-2167 0020-7748 46:8<2158 2007 46 10773 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer