Fluctuation Theory of Rashba Fermi Gases

Abstract

Fermi gases with generalized Rashba spin orbit coupling inducedby a synthetic gauge field have the potential of realizing many interesting states such as rashbon condensates and topological phases. Here we develop a fluctuation theory of such systems and demonstrate that beyond-Gaussian effects are essential to capture the physics of such systems. We obtain their phase diagram by constructing an approximate non-Gaussian theory. We conclusively establish that spin-orbit coupling can enhance the exponentially small transition temperature ($T_c$) of a weakly attracting superfluid to the order of Fermi temperature, paving a pathway towards high $T_c$ superfluids.

6 pages, 5 figures

References in corpus (7)

• Many-Body Physics with Ultracold Gases
• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Observation of pseudogap behavior in a strongly interacting Fermi gas
• Effect of Induced Spin-Orbit Coupling for Atoms via Laser Fields
• Equation of state of a superfluid Fermi gas in the BCS-BEC crossover
• BCS-BEC crossover induced by a synthetic non-Abelian gauge field
• Signatures of pairing and spin-orbit coupling in correlation functions of Fermi gases

Cited by in corpus (4)

• Induced interactions in the BCS-BEC crossover of two-dimensional Fermi gases with Rashba spin-orbit coupling
• Superfluid transition temperature and fluctuation theory of spin-orbit and Rabi-coupled fermions with tunable interactions
• Topological effects on transition temperatures and response functions in three-dimensional Fermi superfluids
• Rashbon bound states associated with a spherical spin-orbit coupling in an ultracold Fermi gas with an $s$-wave interaction