Mean field theory for non-equilibrium quantum fields

R. Jackiw

Physica A: Statistical Mechanics and its Applications, 1989, vol. 158, issue 1, 269-290

Abstract: An approximation technique is provided for studying the time development out of equilibrium of thermal quantum fields, when they experience isoentropic but energy-non-conserving evolution. We implement approximately a variational principle that yields the Liouville-von Neumann equation when implemented exactly. A Gaussian variational Ansatz is made for the density matrix and the approximate theory is a mean-field theory for non-equilibrium isoentropic processes.

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:158:y:1989:i:1:p:269-290

DOI: 10.1016/0378-4371(89)90528-1

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