2012/02/29 by Lianyi He, Xu-Guang Huang · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Bound state #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Coupling (piping) #Crossover #Electron #Fermi Gamma-ray Space Telescope #Fermi gas #Fermion #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin–orbit interaction #Superfluidity #cond-mat.quant-gas #cond-mat.supr-con #nucl-th
paper · pdf · doi:10.1103/physrevb.86.014511
published as Phys. Rev. B 86, 014511 (2012) · V3: published version in PRB
arxiv created 2012/07/11 · openalex publication_date 2012/07/11 · arxiv updated 2012/07/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a systematic theoretical study of the BCS-BEC crossover problem in three-dimensional atomic Fermi gases at zero temperature with a spherical spin-orbit coupling which can be generated by a synthetic non-Abelian gauge field coupled to neutral fermions. Our investigations are based on the path-integral formalism, which is a powerful theoretical scheme for the study of the properties of the bound state, the superfluid ground state, and the collective excitations in the BCS-BEC crossover. At large spin-orbit coupling, the system enters the BEC state of a novel type of bound state (referred to as rashbon), which possesses a nontrivial effective mass. Analytical results and interesting universal behaviors for various physical quantities at large spin-orbit coupling are obtained. Our theoretical predictions can be tested in future experiments of cold Fermi gases with three-dimensional spherical spin-orbit coupling.