Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/198323

Title

Non-universal thermodynamics of a strongly interacting inhomogeneous Fermi gas using the quantum virial expansion

Author(s)

Peng, Shi-Guo;  Liu, Xia-Ji;  Hu, Hui;  Li, Shi-Qun

Abstract

Within a quantum virial expansion, we investigate theoretically the violation of universal thermodynamics for a strongly interacting unitary Fermi gas trapped in a harmonic potential. The violation is caused by the existence and anisotropy of the trapping potential and a finite-range of the two-body interaction. We calculate the second virial coefficient by solving a two-fermion problem in 3D uniform harmonic traps, as well as in anisotropic traps. In the unitarity limit, the universal value of the trapped second virial coefficient is 1/4. We discuss in detail the non-universal correction to the second virial coefficient and to the equation of state.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Atom Optics and Ultrafast Spectroscopy. Centre of Excellence for Quantum-Atom Optics

Source

Physics Letters A, Vol. 375, no. 33 (Aug 2011), pp. 2979-2984

Publication year

2011

FOR Code(s)

01 Mathematical Sciences;  02 Physical Sciences

Keyword(s)

Fermi gas;  Finite-range interaction;  Non-universal thermodynamics;  Quantum virial expansion

Publisher

Elsevier

ISSN

0375-9601

Publisher URL

http://dx.doi.org/10.1016/j.physleta.2011.06.045

Copyright

Copyright © 2011 Elsevier B.V. All rights reserved.

Research Projects

Ultracold atomic Fermi gases in the strongly interacting regime: a new frontier of quantum many-body physics, Australian Research Council grant number DP0984522
Imbalanced superfluidity: the quantum mystery that defies solution, Australian Research Project grant number DP0984637

Peer reviewed