Quantum phases of atomic Fermi gases with anisotropic spin-orbit coupling

We consider a general anisotropic spin-orbit coupling (SOC) and analyze the phase diagrams of both balanced and imbalanced Fermi gases for the entire BCS--Bose-Einstein condensate (BEC) evolution. In the first part, we use the self-consistent mean-field theory at zero temperature, and show that the...

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Bibliographic Details
Published inarXiv.org
Main Authors Iskin, M, Subasi, A L
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 22.09.2011
Subjects
Anisotropy
Cooper pairs
Coupling (molecular)
Critical temperature
Fermi gases
Mean field theory
Phase diagrams
Physics - Quantum Gases
Physics - Strongly Correlated Electrons
Physics - Superconductivity
Quantum theory
Spin-orbit interactions
Time dependence
Variation
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Summary:We consider a general anisotropic spin-orbit coupling (SOC) and analyze the phase diagrams of both balanced and imbalanced Fermi gases for the entire BCS--Bose-Einstein condensate (BEC) evolution. In the first part, we use the self-consistent mean-field theory at zero temperature, and show that the topological structure of the ground-state phase diagrams is quite robust against the effects of anisotropy. In the second part, we go beyond the mean-field description, and investigate the effects of Gaussian fluctuations near the critical temperature. This allows us to derive the time-dependent Ginzburg-Landau theory, from which we extract the effective mass of the Cooper pairs and their critical condensation temperature in the molecular BEC limit.
ISSN:2331-8422
DOI:10.48550/arxiv.1108.4263