Bose-representation for a strongly coupled nonequilibrim fermionic superfluid in a time-dependent trap

Details Bose-representation for a strongly coupled nonequilibrim fermionic superfluid in a time-dependent trap Bose-representation for a strongly coupled nonequilibrim fermionic superfluid in a time-dependent trap

2004-01-29

arxiv.org/abs/cond-mat/0401603v1

Phys. Rev. A 70, 043601 (2004)

Physics

Condensed Matter

Other Condensed Matter

RevTeX 4, 6 pages, 2 eps figures

Scientific paper

10.1103/PhysRevA.70.043601

Using the functional integral formulation of a nonequilibrium quantum many-body theory we develop a regular description of a Fermi system with a strong attractive interaction in the presence of an external time-dependent potential. In the strong coupling limit this fermionic system is equivalent to a noequilibrium dilute Bose gas of diatomic molecules. We also consider a nonequilibrim strongly coupled Bardeen-Cooper-Schrieffer (BCS) theory and show that it reduces to the full nonlinear time-dependent Gross-Pitaevski (GP) equation, which determines an evolution of the condensate wave function.

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