Evaporative depolarization and spin transport in a unitary trapped Fermi gas

Abstract

We consider a partially spin-polarized atomic Fermi gas in a high-aspect-ratio trap, with a flux of predominantly spin-up atoms exiting the center of the trap. We argue that such a scenario can be produced by evaporative cooling, and we find that it can result in a substantially non-equilibrium polarization pattern for typical experimental parameters. We offer this as a possible explanation for the quantitative discrepancies in recent experiments on spin-imbalanced unitary Fermi gases.

6 pages, 3 figures; published version

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Cited by in corpus (22)

• Universal Spin Transport in a Strongly Interacting Fermi Gas
• Ultra-cold Polarized Fermi Gases
• The Fulde-Ferrell-Larkin-Ovchinnikov state for ultracold fermions in lattice and harmonic potentials: a review
• Imbalanced Fermi Gases at Unitarity
• Spin Transport in Polaronic and Superfluid Fermi Gases
• Local versus global equilibration near the bosonic Mott-superfluid transition
• Enlarging and cooling the Néel state in an optical lattice
• Physics of ultracold Fermi gases revealed by spectroscopies
• Finite-temperature equation of state of polarized fermions at unitarity
• Universal Spin Transport and Quantum Bounds for Unitary Fermions
• Phase Diagram of a Strongly Interacting Spin-Imbalanced Fermi Gas
• Spin-polarized droplets in the unitary Fermi gas
• Metastability in Spin-Polarized Fermi Gases
• Concomitant Modulated Superfluidity In Polarized Fermionic Gases
• Bogoliubov-de Gennes study of trapped spin-imbalanced unitary Fermi gases
• Polarized Fermi gases at finite temperature in the BCS-BEC crossover
• Spin Transport in Cold Fermi gases: A Pseudogap Interpretation of Spin Diffusion Experiments at Unitarity
• Competition between Normal Superfluidity and Larkin-Ovchinnikov Phases of Polarized Fermi Gases in Elongated Traps
• Observation of Anomalous Decay of a Polarized Three-Component Fermi Gas
• Transport of Spin and Mass at Normal-Superfluid Interfaces in the Unitary Fermi Gas
• Spin diffusion of lattice fermions in one dimension
• Factor of 1000 suppression of the depolarization rate in ultracold thulium collisions