Spectral signatures of the Fulde-Ferrell-Larkin-Ovchinnikov order parameter in one-dimensional optical lattices

M. Reza Bakhtiari, M. J. Leskinen, P. Törmä

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Abstract

We address an imbalanced two-component atomic Fermi gas restricted by a one-dimensional (1D) optical lattice and an external harmonic potential, within the mean-field Bogoliubov-de Gennes formalism. We show that characteristic features of the Fulde-Ferrell-Larkin-Ovchinnikov state are visible in the rf spectra and in the momentum-resolved photoemission spectra of the gas. Specially, Andreev states or midgap states can be clearly resolved, which gives a direct experimentally observable signature of the oscillating order parameter.

Original languageEnglish
Article number120404
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number12
DOIs
Publication statusPublished - 18 Sep 2008
MoE publication typeA1 Journal article-refereed

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