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Published February 14, 2012 | Published
Journal Article Open

Pairing instabilities in quasi-two-dimensional Fermi gases

Abstract

We study nonequilibrium dynamics of ultracold two-component Fermi gases in low-dimensional geometries after the interactions are quenched from a weakly interacting to a strongly interacting regime. We develop a T-matrix formalism that takes into account the interplay between Pauli blocking and tight confinement in low-dimensional geometries. We employ our formalism to study the formation of molecules in quasi-two-dimensional Fermi gases near Feshbach resonance and show that the rate at which molecules form depends strongly on the transverse confinement. Furthermore, Pauli blocking gives rise to a sizable correction to the binding energy of molecules.

Additional Information

© 2012 American Physical Society. Received 3 October 2011; published 14 February 2012. We would like to thank L. Radzihovsky, M. Köhl, and W. Zwerger for insightful discussions. This work was supported by the Academy of Finland (V.P.), the Army Research Office with funding from the DARPA OLE program, Harvard-MIT CUA, NSF Grant No. DMR-07-05472, AFOSR Quantum Simulation MURI, AFOSR MURI on Ultracold Molecules, and the ARO-MURI on Atomtronics.

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