Sound propagation in a Fermi gas near a Feshbach resonance

Details Sound propagation in a Fermi gas near a Feshbach resonance Sound propagation in a Fermi gas near a Feshbach resonance

2006-12-21

arxiv.org/abs/cond-mat/0612567v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 5 figures

Scientific paper

Sound waves are observed and studied in an optically trapped degenerate Fermi gas of spin-up and spin-down atoms with magnetically tunable interactions. Measurements are made throughout the crossover region, from a weakly-interacting Fermi gas through the resonant Fermi superfluid regime to a Bose condensate of dimer molecules. The measured sound velocities test the equation of state and confirm the universal hypothesis.

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