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Chinese Physics Letters

First and Second Sound Modes in a Uniform Fermi Gas

黄备兵, 完绍龙

Published Jan 1, 2009• 0 citations
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First and Second Sound Modes in a Uniform Fermi Gas

Huang Bei-Bing, Shaolong Wan

First and second sound modes in a uniform fermionic atom gas with Feshbach resonance are investigated in the frame of a two-fluid model at finite temperature. All thermodynamic quantities are calculated for a given thermodynamic potential. The analytical results for thermodynamic quantities and sound velocities in BCS and BEC limits are obtained. The numerical results show that there exists a continuous interpolation for sound velocities of the first and second sound modes at fixed T/T c between BCS and BEC limits. The existence of the second sound mode indicates the existence of superfluidity.

Chinese Physics Letters•Jul 1, 2009•1 citation
First and second sound modes in a uniform fermionic atom gas with Feshbach resonance are investigated in the frame of a two-fluid model at finite temperature. All thermodynamic quantities are calculated for a given thermodynamic potential. The analytical results for thermodynamic quantities and sound velocities in BCS and BEC limits are obtained. The numerical results show that there exists a continuous interpolation for sound velocities of the first and second sound modes at fixed T/T c between BCS and BEC limits. The existence of the second sound mode indicates the existence of superfluidity.