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Sound modes at the BCS-BEC crossover | | H. Heiselberg
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4 Mar 2005 | | Subject: | Superconductivity | cond-mat.supr-con | | Abstract: | First and second sound speeds are calculated for a uniform superfluid gas of fermi atoms as a function of temperature, density and interaction strength. The second sound speed is of particular interest as it is a clear signal of a superfluid component and it determines the critical temperature. The sound modes undergo a smooth crossover from a BCS to a molecular BEC superfluid with avoided crossing on the BEC side due to mixing. Consequently, they are detectable both as density and thermal waves in traps. | | Source: | arXiv, cond-mat/0503101 | | Services: | Forum | Review | PDF | Favorites | |
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