The operation of Maxwell’s demon in a low entropy system
作者:
A. F. Rex,
期刊:
American Journal of Physics
(AIP Available online 1987)
卷期:
Volume 55,
issue 4
页码: 359-362
ISSN:0002-9505
年代: 1987
DOI:10.1119/1.15171
出版商: American Association of Physics Teachers
关键词: ENTROPY;THERMODYNAMICS;PHOTONS;VELOCITY DISTRIBUTION
数据来源: AIP
摘要:
The problem of Maxwell’s sorting demon traditionally has been studied for the case in which the hot and cold regions differ very little in temperature. In this article a solution is presented for the case in which the temperature difference is great so that the total entropy is lower. Calculations indicate that in this case the demon must use a large number of photons to observe the proper kinds of particles. This causes an increase in entropy which more than offsets the decrease caused by an exchange of particles.
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