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Phys Rev Lett. 2012 Jun 1;108(22):225302. Epub 2012 May 29.

Expansion of 1D polarized superfluids: the Fulde-Ferrell-Larkin-Ovchinnikov state reveals itself.

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1
Department of Physics and Astronomy, Rice University, 6100 Main Street, MS-61, Houston, Texas 77005, USA.

Abstract

We study the expansion dynamics of a one-dimensional polarized Fermi gas after its sudden release from confinement using both the mean-field Bogoliubov-deĀ Gennes and the numerically unbiased time-evolving block decimation methods. Our results show that experimentally observable spin density modulations, directly related to the presence of a Fulde-Ferrell-Larkin-Ovchinnikov state, develop during the expansion of the cloud. Our work therefore provides a robust theoretical proposal for the detection of this long-sought state.

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