Signature of the Fulde-Ferrell-Larkin-Ovchinnikov Phase in the Collective Modes of a Trapped Ultracold Fermi Gas

Journal Article · Fri Aug 07 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.065301· OSTI ID:21370643

Edge, Jonathan M; Cooper, N R ^[1]

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1. T.C.M. Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom)

We study theoretically the collective modes of a two-component Fermi gas with attractive interactions in a quasi-one-dimensional harmonic trap. We focus on an imbalanced gas in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. Using a mean-field theory, we study the response of the ground state to time-dependent potentials. For potentials with short wavelengths, we find dramatic signatures in the large-scale response of the gas which are characteristic of the FFLO phase. This response provides an effective way to detect the FFLO state in experiments.

• OSTI ID: 21370643
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENERGY LEVELS
FERMI GAS
GROUND STATES
INTERACTIONS
MEAN-FIELD THEORY
ONE-DIMENSIONAL CALCULATIONS
POTENTIALS
TIME DEPENDENCE
TRAPPING
TRAPS
WAVELENGTHS