Universal contact and collective excitations of a strongly interacting Fermi gas
arXiv:1105.6238 · doi:10.1103/PhysRevA.84.023628
Abstract
We study the relationship between Tan's contact parameter and the macroscopic dynamic properties of an ultracold trapped gas, such as the frequencies of the collective oscillations and the propagation of sound in one-dimensional (1D) configurations. We find that the value of the contact, extracted from the most recent low-temperature measurements of the equation of state near unitarity, reproduces with accuracy the experimental values of the collective frequencies of the radial breathing mode at the lowest temperatures. The available experiment results for the 1D sound velocities near unitarity are also investigated.
5 pages, 3 figures
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Cited by in corpus (5)
- General relations for quantum gases in two and three dimensions. Two-component fermions
- Precise determination of the structure factor and contact in a unitary Fermi gas
- Quantum anomaly, universal relations, and breathing mode of a two-dimensional Fermi gas
- Universal relations for the two-dimensional spin-1/2 Fermi gas with contact interactions
- Cornwall-Jackiw-Tomboulis effective field theory to nonuniversal equation of state of an ultracold Bose gas