Fermi liquid theory of ultra-cold trapped Fermi gases: Implications for Pseudogap Physics and Other Strongly Correlated Phases

Abstract

We show how Fermi liquid theory can be applied to ultra-cold Fermi gases, thereby expanding their "simulation" capabilities to a class of problems of interest to multiple physics sub-disciplines. We introduce procedures for measuring and calculating position dependent Landau parameters. This lays the ground work for addressing important controversial issues: (i) the suggestion that thermodynamically, the normal state of a unitary gas is indistinguishable from a Fermi liquid (ii) that a fermionic system with strong repulsive contact interactions is associated with either ferromagnetism or localization; this relates as well to ${}^3$He and its p-wave superfluidity.

4 pages, 2 figures, revised version

References in corpus (7)

• Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
• Exploring the Thermodynamics of a Universal Fermi Gas
• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Tomographic RF Spectroscopy of a Trapped Fermi Gas at Unitarity
• Correlated versus Ferromagnetic State in Repulsively Interacting Two-Component Fermi Gases
• Comparative Study of BCS-BEC Crossover Theories above $T_c$: the Nature of the Pseudogap in Ultra-Cold Atomic Fermi Gases
• Itinerant Ferromagnetism in an Atom Trap

Cited by in corpus (10)

• Speckle Imaging of Spin Fluctuations in a Strongly Interacting Fermi Gas
• Pseudogaps in strongly interacting Fermi gases
• Evolution of the Pseudogap in a polarized Fermi gas
• Pairing correlations across the superfluid phase transition in the unitary Fermi gas
• Fermi-to-Bose crossover in a trapped quasi-2D gas of fermionic atoms
• Theory of SU(N) Fermi liquid
• Spin Transport in Cold Fermi gases: A Pseudogap Interpretation of Spin Diffusion Experiments at Unitarity
• Pair condensation in a Finite Trapped Fermi Gas
• Effects of interaction on field-induced resonances in confined Fermi liquid
• Dynamics of a quantum quench in an ultra-cold atomic BCS superfluid