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The Twist Mode in Atomic Fermi Gases

X. Vinas·R. Roth·P. Schuck·J. Wambach
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Abstract

The quantum-kinetic energy of a finite number of trapped fermionic atoms provides a restoring force for shear motion due to a distortion of the momentum distribution. In analogy to the twist mode of nuclear physics it is proposed that counter-rotating the upper and lower hemisphere of a spherical atomic cloud yields a finite-frequency mode closely related to transverse zero-sound waves in bulk Fermi liquids.

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X. Vinas, R. Roth, P. Schuck, J. Wambach. 2001-06-20. The Twist Mode in Atomic Fermi Gases. https://doi.org/10.1103/physreva.64.055601

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