Measurement of the entropy and critical temperature of a strongly interacting Fermi gas.


Journal Article

We report a model-independent measurement of the entropy, energy, and critical temperature of a degenerate, strongly interacting Fermi gas of atoms. The total energy is determined from the mean square cloud size in the strongly interacting regime, where the gas exhibits universal behavior. The entropy is measured by sweeping a bias magnetic field to adiabatically tune the gas from the strongly interacting regime to a weakly interacting regime, where the entropy is known from the cloud size after the sweep. The dependence of the entropy on the total energy quantitatively tests predictions of the finite-temperature thermodynamics.

Full Text

Duke Authors

Cited Authors

  • Luo, L; Clancy, B; Joseph, J; Kinast, J; Thomas, JE

Published Date

  • February 21, 2007

Published In

Volume / Issue

  • 98 / 8

Start / End Page

  • 080402 -

PubMed ID

  • 17359072

Pubmed Central ID

  • 17359072

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.98.080402


  • eng