Expansion of a Fermi cloud in the BCS-BEC crossover

Reference : Expansion of a Fermi cloud in the BCS-BEC crossover


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/9067

Title :	Expansion of a Fermi cloud in the BCS-BEC crossover
Language :	English
Author, co-author :	Diana, Giovanni [Universita di Milano > Dipartimento di Fisica and CNR-INFM]
	Manini, Nicola [Universita di Milano > Dipartimento di Fisica and CNR-INFM]
	Salasnich, Luca [CNR-INFM and CNISM > > Unita di Milano]
Publication date :	2006
Journal title :	Physical Review. A
Publisher :	APS
Volume :	73
Issue/season :	6
Pages :	065601
Peer reviewed :	Yes
Audience :	International
Keywords :	[en] Bose einstein condensation ; BCS
Abstract :	[en] We study the free expansion of a dilute two-component Fermi gas with attractive interspecies interaction in the BCS-BEC crossover. We apply a time-dependent parameter-free density-functional theory by using two choices of the equation of state: an analytic formula based on Monte Carlo data and the mean-field equation of state resulting from the extended BCS equations. The calculated axial and transverse radii and the aspect ratio of the expanding cloud are compared to experimental data on vapors of 6 Li atoms. Remarkably, the mean-field theory shows a better agreement with the experiments than the theory based on the Monte Carlo equation of state. Both theories predict a measurable dependence of the aspect ratio on expansion time and on scattering length.
Permalink :	http://hdl.handle.net/10993/9067
DOI :	10.1103/PhysRevA.73.065601
Other URL :	http://link.aps.org/doi/10.1103/PhysRevA.73.065601

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