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Collective excitations of an imbalanced fermion gas in a 1D optical lattice
- Publication Year :
- 2013
-
Abstract
- The collective excitations that minimize the Helmholtz free energy of a population-imbalanced mixture of a $^{6}$Li gas loaded in a quasi one-dimensional optical lattice are obtained. These excitations reveal a rotonic branch after solving the Bethe-Salpeter equation under a generalized random phase approximation based on a single-band Hubbard Hamiltonian. The phase diagram describing stability regions of Fulde-Farrell-Larkin-Ovchinnikov and Sarma phases is also analyzed.<br />Comment: Six pages and 3 figures
- Subjects :
- Condensed Matter - Quantum Gases
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1307.2655
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1007/s10909-013-0926-2