Released Momentum Distribution of a Fermi Gas in the BCS-BEC Crossover

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M. L. Chiofalo,¹ S. Giorgini,^2,3 and M. Holland²
¹INFM and Classe di Scienze, Scuola Normale Superiore, Pisa, Italy
²JILA and Department of Physics, University of Colorado at Boulder, Boulder, Colorado 80309-0440, USA
³Dipartimento di Fisica, Università di Trento and BEC-INFM, I-38050 Povo, Italy

Received 19 December 2005; published 18 August 2006

Wedevelop a time-dependent mean-field theory to investigate the released momentumdistribution and the released energy of an ultracold Fermi gasin the BCS-BEC crossover after the scattering length has beenset to zero by a fast magnetic-field ramp. For ahomogeneous gas we analyze the nonequilibrium dynamics of the systemas a function of the interaction strength and of theramp speed. For a trapped gas the theoretical predictions arecompared with experimental results.

URL:	http://link.aps.org/doi/10.1103/PhysRevLett.97.070404
DOI:	10.1103/PhysRevLett.97.070404
PACS:	03.75.Ss; 05.30.Fk 03.75.Ss Degenerate Fermi gases 05.30.Fk Fermion systems and electron gas (quantum statistical mechanics) YEAR: 2006

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