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Heat Capacity of a Strongly-Interacting Fermi Gas

J. Kinast·A. Turlapov·J. E. Thomas·Qijin Chen·Jelena Stajic·K. Levin
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Abstract

We have measured the heat capacity of an optically-trapped, strongly-interacting Fermi gas of atoms. A precise input of energy to the gas is followed by single-parameter thermometry, which determines the empirical temperature parameter $\tilde{T}$ of the gas cloud. Our measurements reveal a clear transition in the heat capacity. The energy and the spatial profile of the gas are computed using a theory of the crossover from Fermi to Bose superfluids at finite temperature. The theory calibrates $\tilde{T}$, yields excellent agreement with the data, and predicts the onset of superfluidity at the observed transition point.

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J. Kinast, A. Turlapov, J. E. Thomas, Qijin Chen, Jelena Stajic, K. Levin. 2005-02-03. Heat Capacity of a Strongly-Interacting Fermi Gas. https://doi.org/10.1126/science.1109220

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