arXiv:cond-mat/0106416·v1·Statistical Mechanics
The Twist Mode in Atomic Fermi Gases
X. Vinas🇪🇸 · R. Roth🇩🇪 · P. Schuck🇫🇷 · J. Wambach🇩🇪
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.
Comments: 4 pages, 1 table (using REVTeX)