Bose representation for a strongly coupled nonequilibrium fermionic superfluid in a time-dependent trap
Journal Article
·
· Physical Review. A
- Lerhrstuhl fuer Theoretische Festkoerperphysik, Universitaet Erlangen-Nuernberg, Staudtstrasse 7/B2, 91058 Erlangen (Germany)
Using the functional integral formulation of 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 nonequilibrium dilute Bose gas of diatomic molecules. We also consider nonequilibrium strongly coupled Bardeen-Cooper-Schrieffer theory and show that it reduces to the full nonlinear time-dependent Gross-Pitaevski equation, which determines the evolution of the condensate wave function.
- OSTI ID:
- 20646395
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 70; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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