Comparison between a diagrammatic theory for the BCS-BEC crossover and quantum Monte Carlo results

2004/10/22 by P. Pieri, L. Pisani, G. C. Strinati
Physics and Astronomy · #Advanced Chemical Physics Studies #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #cond-mat.other #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.72.012506

published as Phys. Rev. B 72, 012506 (2005) · 3 pages, 2 figures

arxiv created 2004/10/22 · openalex publication_date 2005/07/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Predictions for the chemical potential and the excitation gap recently obtained by our diagrammatic theory for the Bardeen-Cooper-Schreiffer--Bose-Einstein Condensation crossover in the superfluid phase are compared with quantum Monte Carlo results at zero temperature now available in the literature. A remarkable agreement is found between the results obtained by the two approaches.

Citations

• Observation of Resonance Condensation of Fermionic Atom Pairs
• Collective Excitations of a Degenerate Gas at the BEC-BCS Crossover
• Broad vs. narrow Fano-Feshbach resonances in the BCS-BEC crossover with trapped Fermi atoms

Related

• BEC, BCS and BCS-Bose Crossover Theories in Superconductors and Superfluids
• Extracting the condensate density from projection experiments with Fermi gases
• Local-field Theory of the BCS-BEC Crossover
• Diagrammatic Pairing Fluctuations Approach to the BCS-BEC Crossover
• BCS-BEC crossover at finite temperature in the broken-symmetry phase