期刊
PROGRESS OF THEORETICAL PHYSICS
卷 121, 期 3, 页码 555-575出版社
PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE
DOI: 10.1143/PTP.121.555
关键词
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资金
- U.S. Department of Energy [DE-FG02-05ER41367]
- Bundesministerium fur Bildung und Forschung
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [20540265, 17070002, 19540252]
- Grants-in-Aid for Scientific Research [17070002] Funding Source: KAKEN
We propose a broadly applicable formalism for the description of coarse grained entropy production in quantum mechanical processes. Our formalism is based on the Husimi transform of the quantum state, which encodes the notion that information about any quantum state is limited by the experimental resolution. We show in two analytically tractable cases (the decay of an unstable vacuum state and reheating after cosmic inflation) that the growth rate of the Wehrl entropy associated with the Husimi function approaches the classical Kolmogorov-Sinai entropy. We also discuss various possible applications of our formalism, including the production of entropy in the early stages of a relativistic heavy ion collision.
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