Heat Capacity of a Strongly-Interacting Fermi Gas

Details Heat Capacity of a Strongly-Interacting Fermi Gas Heat Capacity of a Strongly-Interacting Fermi Gas

2005-02-03

arxiv.org/abs/cond-mat/0502087v1

J Kinast, A Turlapov, JE Thomas, Chen, Stajic, & K Levin, Science, 27 January 2005 (10.1126/science.1109220)

Physics

Condensed Matter

Other Condensed Matter

This paper is a joint version of cond-mat/0409283 and cond-mat/0411090. The joint paper was published in Science Express and w

Scientific paper

10.1126/science.1109220

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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