Crossover from BCS to Bose superconductivity: A functional integral approach
- Argonne National Lab., IL (United States)
- Illinois Univ., Urbana, IL (United States). Dept. of Physics
We use a functional integral formulation to study the crossover from cooperative Cooper pairing to the formation and condensation of tightly bound pairs in a 3D continuum model of fermions with attractive interactions. The inadequacy of a saddle point approximation with increasing coupling is pointed out, and the importance of temporal (quantum) fluctuations for normal state properties at intermediate and strong coupling is emphasized. In addition to recovering the Nozieres-Schmitt-Pink interpolation scheme for T{sub c}, and the Leggett variational results for T = 0, we also present results for evolution of the time-dependent Ginzburg-Landau equation and collective mode spectrum as a function of the coupling.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10180792
- Report Number(s):
- ANL/MSD/CP-79538; CONF-930801-8; ON: DE93019503; CNN: Grant STC 88-09854; Grant DMR 88-22688; TRN: 93:020037
- Resource Relation:
- Conference: Conference of the International Union of Pure and Applied Physics on low temperature physics (LT 20),Eugene, OR (United States),1-11 Aug 1993; Other Information: PBD: Apr 1993
- Country of Publication:
- United States
- Language:
- English
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