Dimensional crossover in a spin-imbalanced Fermi gas
Abstract
We model the one-dimensional (1D) to three-dimensional (3D) crossover in a cylindrically trapped Fermi gas with attractive interactions and spin imbalance. We calculate the mean-field phase diagram and study the relative stability of exotic superfluid phases as a function of interaction strength and temperature. For weak interactions and low density, we find 1D-like behavior, which repeats as a function of the chemical potential as new channels open. For strong interactions, mixing of single-particle levels gives 3D-like behavior at all densities. Furthermore, we map the system to an effective 1D model, finding significant density dependence of the effective 1D scattering length. © 2016 American Physical Society.
Date Published
Journal
Physical Review A
Volume
94
Issue
6
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85007137727&doi=10.1103%2fPhysRevA.94.063627&partnerID=40&md5=b032b478788b62cd0e1152d960bdf7f2
DOI
10.1103/PhysRevA.94.063627
Research Area
Group (Lab)
Funding Source
1508300
PHY-1508300