Abstract
It is shown by microscopic calculations for trapped imbalanced Fermi superfluids that the gap function always has sign changes, i.e., the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)-like state, up to a critical imbalance , beyond which normal state becomes stable, at temperature . A temperature-versus-pressure phase diagram is constructed, where the BCS state without sign change is stable only at . We reproduce the observed bimodality in the density profile to identify its origin and evaluate as functions of and the coupling strength. These dependencies match with the recent experiments.
- Received 8 April 2006
DOI:https://doi.org/10.1103/PhysRevLett.97.120407
©2006 American Physical Society