Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-05-31
Phys. Rev. A 84, 023628 (2011)
Physics
Condensed Matter
Quantum Gases
5 pages, 3 figures
Scientific paper
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.
Li Yun
Stringari Sandro
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