Realization and Detection of Fulde-Ferrell-Larkin-Ovchinnikov Superfluid Phases in Trapped Atomic Fermion Systems
arXiv:cond-mat/0504691 · doi:10.1103/PhysRevLett.95.218903
Abstract
In a very interesting recent Letter\cite{machida}, the authors suggested the possibility of realizing the spatially modulated, or Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superfluid state in trapped atomic fermion systems. The authors this Letter used a 1D mean field solution as guidance to estimate the parameter range for the existence of the FFLO phase, and also discussed the possibility of its detection by imaging the atomic density of the system. In this comment I wish to make two points. (i) In 1D there exists an exact solution based on bosonization, which fully takes into account the important quantum fluctuation effects\cite{yang01}; the exact solution suggests a wider parameter range for the FFLO state than that obtained from the mean-field solution of the present Letter. (ii) One can detect the FFLO pairing (in which Cooper pairs carry finite momenta) more directly by extending the methods used to detect BCS pairing\cite{regal,altman,greiner}.
Revised version as appeared in print
Cited by in corpus (14)
- Dislocations and vortices in pair density wave superconductors
- BEC-BCS crossover, phase transitions and phase separation in polarized resonantly-paired superfluids
- Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in one-dimensional optical lattices
- The FFLO state in the one-dimensional attractive Hubbard model and its fingerprint in the spatial noise correlations
- Pairing in a three component Fermi gas
- Long-time behavior of the momentum distribution during the sudden expansion of a spin-imbalanced Fermi gas in one dimension
- Stable Fulde-Ferrell-Larkin-Ovchinnikov pairing states in 2D and 3D optical lattices
- Fermion pairing with spin-density imbalance in an optical lattice
- Expansion of 1D polarized superfluids: The FFLO state reveals itself
- Interferometric probe of paired states
- Enhanced visibility of the Fulde-Ferrell-Larkin-Ovchinnikov state in one dimensional Bose-Fermi mixtures near the immiscibility point
- Anomalous specific heat jump in a two-component ultracold Fermi gas
- Spin-imbalanced ultracold Fermi gases in a two-dimensional array of tubes
- Strong Fulde-Ferrell Larkin-Ovchinnikov pairing fluctuations in polarized Fermi systems