Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-09-28
Prog.Theor.Phys.121:555-575,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 pages, 6 figures. One section is added in v2
Scientific paper
10.1143/PTP.121.555
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.
Kunihiro Teiji
Müller Berndt
Ohnishi Akira
Sch{ä}fer Andreas
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