BCS-BEC crossover in an asymmetric two-component Fermi gas
| dc.creator | Liu, Xia-Ji | |
| dc.creator | Hu, Hui | |
| dc.date | 2006-03-01 | |
| dc.date | 2006-06-20 | |
| dc.date.accessioned | 2026-07-07T07:02:02Z | |
| dc.date.available | 2026-07-07T07:02:02Z | |
| dc.description | We discuss the superfluid phase transition of a strongly interacting Fermi gas with unequal (asymmetric) chemical potentials in two pairing hyperfine states, and map out its phase diagram near the BCS-BEC crossover. Our approach includes the fluctuation contributions of {}``preformed Cooper pairs'' to the thermodynamic potential at finite temperature. We show that, below a critical difference in chemical potentials between species, a normal gas is unstable towards the formation of either a finite-momentum paired Fulde-Ferrell-Larkin-Ovchinnikov superconducting phase or a uniform superfluid, depending on the asymmetry and interaction strengths. We determine the value of critical chemical potential mismatch, and find good qualitative agreement with a recent measurement by Zwierlein \textit{et al.} {[}Science \textbf{311}, 492 (2006){]}. | |
| dc.description | 7 pages + 3 figures; To appear in Europhysics Letters | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0603011 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0603011 | |
| dc.identifier | Europhys. Lett. 75, 364 (2006) | |
| dc.identifier | doi:10.1209/epl/i2006-10136-3 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/108467 | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Superconductivity | |
| dc.title | BCS-BEC crossover in an asymmetric two-component Fermi gas | |
| dc.type | text |