The Twist Mode in Atomic Fermi Gases

Details The Twist Mode in Atomic Fermi Gases The Twist Mode in Atomic Fermi Gases

2001-06-20

arxiv.org/abs/cond-mat/0106416v1

Phys.Rev.A64:055601,2001

Physics

Condensed Matter

Statistical Mechanics

4 pages, 1 table (using REVTeX)

Scientific paper

10.1103/PhysRevA.64.055601

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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