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arXiv · 2008.04083

Drag in Bose-Fermi Mixtures

Kai Yen Jee·Erich J. Mueller
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Abstract

We use kinetic theory to model the dynamics of a small Bose condensed cloud of heavy particles moving through a larger degenerate Fermi gas of light particles. Varying the Bose-Fermi interaction, we find a crossover between bulk and surface dominated regimes -- where scattering occurs throughout the Bose cloud, or solely on the surface. We calculate the damping and frequency shift of the dipole mode in a harmonic trap as a function of the magnetic field controlling an inter-species Feshbach resonance. We find excellent agreement between our stochastic model and the experimental studies of Cs-Li mixtures.

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Kai Yen Jee, Erich J. Mueller. 2021-01-14. Drag in Bose-Fermi Mixtures. https://doi.org/10.1103/physreva.103.033307

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