Colliding clouds of strongly interacting spin-polarized fermions

Abstract

Motivated by a recent experiment at MIT, we consider the collision of two clouds of spin-polarized atomic Fermi gases close to a Feshbach resonance. We explain why two dilute gas clouds, with underlying attractive interactions between their constituents, bounce off each other in the strongly interacting regime. Our hydrodynamic analysis, in excellent agreement with experiment, gives strong evidence for a metastable many-body state with effective repulsive interactions.

6 pages, 5 figures

References in corpus (8)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Universal Quantum Viscosity in a Unitary Fermi Gas
• Itinerant Ferromagnetism in a Fermi Gas of Ultracold Atoms
• Universal Spin Transport in a Strongly Interacting Fermi Gas
• Collisional Properties of a Polarized Fermi Gas with Resonant Interactions
• Atom Loss Maximum in Ultra-cold Fermi Gases
• Collision of two spin polarized fermionic clouds

Cited by in corpus (19)

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• Spin susceptibility and fluctuation corrections in the BCS-BEC crossover regime of an ultracold Fermi gas
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• Nonperturbative Effects on the Ferromagnetic Transition in Repulsive Fermi Gases
• Uniform spin susceptibility and spin-gap phenomenon in the BCS-BEC crossover regime of an ultracold Fermi gas
• Universal Spin Transport and Quantum Bounds for Unitary Fermions
• Probing strongly interacting atomic gases with energetic atoms
• Unified description of dynamics of a repulsive two-component Fermi gas
• Ground-state densities of repulsive two-component Fermi gases
• Breathing Mode of a Bose-Einstein Condensate Immersed in a Fermi Sea
• Finite range and upper branch effects on itinerant ferromagnetism in repulsive Fermi gases: Bethe-Goldstone ladder resummation approach
• Collisional dynamics of polaronic clouds immersed in a Fermi sea
• Many-body molecule formation at a domain wall in a one-dimensional strongly interacting ultracold Fermi gas
• Short-time Spin Dynamics in Strongly Correlated Few-fermion Systems
• Inhomogeneous spin diffusion in traps with cold atoms
• Dynamical symmetry and pair tunneling in a one-dimensional Bose gas colliding with a mobile impurity
• Mechanism for sound dissipation in a two-dimensional degenerate Fermi gas
• Spin Susceptibility and Strong Coupling Effects in an Ultracold Fermi Gas