2008/05/18 by G. J. Conduit, Peter Conlon, P. H. Conlon +2
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Crossover #Electron #Fermi Gamma-ray Space Telescope #Fermi gas #Homogeneous #Phase (matter) #Phase transition #Physics #Population #Quantum mechanics #Quantum, superfluid, helium dynamics #Statistical physics #Superfluidity #cond-mat.other #cond-mat.str-el
paper · pdf · doi:10.1103/physreva.77.053617
published as Phys.Rev.A77:053617,2008 · 11 pages, 6 figures. Accepted by Phys. Rev. A
arxiv created 2008/05/18 · openalex publication_date 2008/05/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We explore the zero-temperature phase behavior of a two-dimensional two-component atomic Fermi gas with population and mass imbalance in the regime of the BEC-BCS crossover. Working in the mean-field approximation, we show that the normal and homogeneous balanced superfluid phases are separated by an inhomogeneous superfluid phase of Fulde-Ferrel-Larkin-Ovchinnikov (FFLO) type. We obtain an analytical expression for the line of continuous transitions separating the normal and inhomogeneous FFLO phases. We further show that the transition from the FFLO phase to the homogeneous balanced superfluid is discontinuous leading to phase separation. If the species have different masses, the superfluid phase is favored when the lighter species is in excess. We explore the implications of these findings for the properties of the two-component Fermi gas in the atomic trap geometry. Finally, we compare and contrast our findings with the predicted phase behavior of the electron-hole bilayer system.