%0 Journal Article
%T THE NERNST THEOREM AND STATISTICAL ENTROPY OF THE SCALAR FIELD IN REISSNER-NORDSTROM GEOMETRY<br>Reissner-Nordstrom几何中标量场的统计熵与能斯特定理
%A ZHAO REN
%A ZHANG LI-CHUN
%A <br>赵仁
%A 张丽春
%J 物理学报
%D 2001
%I 
%X Based on the Klein-Gordon equations on the background of the Reisser-Nordstrom spacetime, we calculate the free energy and entropy of a scalar field near a black hole by improved brick-wall methodmembrane model. It is obtained that the entropy of the scalar field consists of two parts. As the entropy is an extensive quantity, we obtain that the black hole entropy comes from two thermodynamical systems. And the new Bekenstein-Smarr formula is given. It is shown that the entropy expressed by two thermodynamical subsystems approaches zero when the radiation temperature of the black hole approaches absolute zero. This obeys Nernst theorem. It can be taken as Planck absolute entropy of a black hole.
%K brick-wall method
%K membrane model
%K black hole entropy
%K Nernst theorem<br>brick-wall方法
%K 膜模型
%K 黑洞熵
%K 能斯特定理
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=E3EE2150BB41645D&yid=14E7EF987E4155E6&vid=771152D1ADC1C0EB&iid=B31275AF3241DB2D&sid=C368DFEE1EA2C91D&eid=5839F1C61E1C000D&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=19