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Hydrodynamic excitations of trapped dipolar fermions

K. Goral·M. Brewczyk·K. Rzazewski
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Abstract

A single-component Fermi gas of polarized dipolar particles in a harmonic trap can undergo a mechanical collapse due to the attractive part of the dipole-dipole interaction. This phenomenon can be conveniently manipulated by the shape of the external trapping potential. We investigate the signatures of the instability by studying the spectrum of low-lying collective excitations of the system in the hydrodynamic regime. To this end, we employ a time-dependent variational method as well as exact numerical solutions of the hydrodynamic equations of the system.

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K. Goral, M. Brewczyk, K. Rzazewski. 2003-02-06. Hydrodynamic excitations of trapped dipolar fermions. https://doi.org/10.1103/physreva.67.025601

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