Signature of the FFLO phase in the collective modes of a trapped ultracold Fermi gas

Abstract

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.

arXiv commentpublished version

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Cited by in corpus (33)

• Fermi gases in one dimension: From Bethe Ansatz to experiments
• Imbalanced Feshbach-resonant Fermi gases
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Fluctuations and phase transitions in Larkin-Ovchinnikov liquid crystal states of population-imbalanced resonant 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
• Probing the FFLO phase by double occupancy modulation spectroscopy
• Enhancement effect of mass imbalance on Fulde-Ferrell-Larkin-Ovchinnikov type of pairing in Fermi-Fermi mixtures of ultracold quantum gases
• Asymptotic correlation functions and FFLO signature for the one-dimensional attractive spin-1/2 Fermi gas
• Polylogs, thermodynamics and scaling functions of one-dimensional quantum many-body systems
• Interaction quantum quenches in the one-dimensional Fermi-Hubbard model with spin imbalance
• Signatures of unconventional pairing in spin-imbalanced one-dimensional few-fermion systems
• Fulde-Ferrell--Larkin-Ovchinnikov state in the dimensional crossover between one- and three-dimensional lattices
• Collective modes and the speed of sound in the Fulde-Ferrell-Larkin-Ovchinnikov state
• Competition between Normal Superfluidity and Larkin-Ovchinnikov Phases of Polarized Fermi Gases in Elongated Traps
• Excitonic condensation in spatially separated one-dimensional systems
• Collective modes as a probe of imbalanced Fermi gases
• Critical phenomena in one dimension from a Bethe ansatz perspective
• Enhanced visibility of the Fulde-Ferrell-Larkin-Ovchinnikov state in one dimensional Bose-Fermi mixtures near the immiscibility point
• Collective modes of a soliton train in a Fermi superfluid
• Superfluidity of a spin-imbalanced Fermi gas in a three-dimensional optical lattice
• Dimensional Crossover in a Spin-imbalanced Fermi gas
• Pure Fulde-Ferrell-Larkin-Ovchinnikov state in optical lattices
• Josephson effect in an atomic Fulde-Ferrell-Larkin-Ovchinnikov superfluid
• Density response of a trapped Fermi gas: a crossover from the pair vibration mode to the Goldstone mode
• Triplet pair correlations in {\it s-}wave superfluids as a signature of the FFLO state
• Protocol to engineer Fulde-Ferrell-Larkin-Ovchinnikov states in a cold Fermi gas
• Do phase fluctuations influence the Fulde-Ferrell-Larkin-Ovchinnikov state in a 3D Fermi gas?
• Detecting Topological Phase Transition in Superconductor-Semiconductor Hybrids by Electronic Raman Spectroscopy
• Collective modes in Fulde-Ferrell-Larkin-Ovchinnikov superconductors: The role of long-range Coulomb interaction and signatures in density response
• Novel dynamical excitations and roton-based measurement of Cooper-pair momentum in a two-dimensional Fulde-Ferrell-Larkin-Ovchinnikov superfluid on optical lattices
• Unconventional pairing in few-fermion systems tuned by external confinement
• Exotic superfluid of trapped Fermi gases with spin-orbit coupling in dimensional crossover