期刊
EUROPEAN PHYSICAL JOURNAL C
卷 75, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-015-3744-7
关键词
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资金
- START-UP RESEARCH GRANT from Indian Institute of Technology Guwahati, India [SG/PHY/P/BRM/01]
It is often argued that all the information of a gravitational theory is encoded in the surface term of the action; which means one can find several physical quantities just from the surface term without incorporating the bulk part of the action. This has been observed in various instances; e.g. the derivation of the Einstein's equations, the surface term calculated on the horizon leads to the entropy, etc. Here I investigate the role of it in the context of the entropy function and the entropy of extremal near horizon black holes. Considering only the Gibbons-Hawking-York (GHY) surface term to define an entropy function for the extremal near horizon black hole solution, it is observed that the extremization of such a function leads to the exact value of the horizon entropy. This analysis again supports the previous claim that the gravitational action is of a holographic nature - the surface term contains information of the bulk.
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