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

2004/01/29 by I. V. Tokatly
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Strong Light-Matter Interactions #cond-mat.other

paper · pdf · doi:10.1103/physreva.70.043601

published as Phys. Rev. A 70, 043601 (2004) · RevTeX 4, 6 pages, 2 eps figures

arxiv created 2004/01/29 · openalex publication_date 2004/10/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

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.

Citations

• Quantum field-theoretical methods in transport theory of metals
• Observation of resonance condensation of fermionic atom pairs
• Weakly Bound Dimers of Fermionic Atoms
• Time-dependent Gross-Pitaevskii equation for composite bosons as the strong-coupling limit of the fermionic broken-symmetry random-phase approximation
• Time Variation of the Ginzburg-Landau Order Parameter
• Observation of Bose-Einstein Condensation of Molecules