Home List of Titles Comparison between theory and experiment for universal thermodynamics of a homogeneous, strongly correlated Fermi gas
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- Comparison between theory and experiment for universal thermodynamics of a homogeneous, strongly correlated Fermi gas
- Hu, Hui; Liu, Xia-Ji; Drummond, Peter D.
- We compare the theoretical predictions for universal thermodynamics of a homogeneous, strongly correlated Fermi gas with the latest experimental measurements reported by the ENS group [S. Nascimbène et al., Nature (London) 463, 1057 (2010)] and the Tokyo group [M. Horikoshi et al., Science 327, 442 (2010)]. The theoretical results are obtained using two diagrammatic theories, together with a virial expansion theory combined with a Páde approximation. We find good agreement between theory and experiment. In particular, the virial expansion, using a Páde approximation up to third order, describes the experimental results extremely well down to the superfluid transition temperature, Tc~0.16TF, where TF is the Fermi temperature. The comparison in this work complements our previous comparative study on the universal thermodynamics of a strongly correlated but trapped Fermi gas. The comparison also raises interesting issues about the unitary entropy and the applicability of the Páde approximation.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Atom Optics and Ultrafast Spectroscopy
- Physical Review A, Vol. 83, no. 6 (Jun 2011), paper no. 063610
- Publication year
- FOR Code(s)
- 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0204 Condensed Matter Physics; 0205 Optical Physics
- Fermi gases; Temperature; Thermodynamics
- American Physical Society
- Publisher URL
- Copyright © 2011 American Physical Society. Published version of the paper reproduced here with the kind permission of the publisher.
- Research Projects
- Full text
- Peer reviewed