Non-Markovian Quantum Kinetics and Conservation Laws |
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Authors: | V G Morozov Gerd Röpke |
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Institution: | (1) Department of Physics, Rostock University, 18051 Rostock, Germany |
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Abstract: | A link between memory effects in quantum kinetic equations and nonequilibrium correlations associated with the energy conservation is investigated. In order that the energy be conserved by an approximate collision integral, the one-particle distribution function and the mean interaction energy are treated as independent nonequilibrium state parameters. The density operator method is used to derive a kinetic equation in second-order non-Markovian Born approximation and an evolution equation for the nonequilibrium quasi-temperature which is thermodynamically conjugated to the mean interaction energy. The kinetic equation contains a correlation contribution which exactly cancels the collision term in thermal equilibrium and ensures the energy conservation in nonequilibrium states. Explicit expressions for the entropy production in the non-Markovian regime and the time-dependent correlation energy are obtained. |
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Keywords: | nonequilibrium statistical mechanics quantum kinetic theory non-Markovian kinetic equations nonequilibrium correlations |
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