Probing the Fulde-Ferrell-Larkin-Ovchinnikov phase by double occupancy modulation spectroscopy

Anna Korolyuk*, Francesco Massel, Päivi Törmä

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

34 Citations (Scopus)
277 Downloads (Pure)

Abstract

In this Letter we consider a spin-imbalanced two-component attractive Fermi gas loaded in a 1D optical lattice in the presence of an harmonic confining potential. We propose that the observation of the change in the double occupancy with respect to a lattice depth modulation can provide clear evidence of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. Simulating the time evolution of the system, we can characterize the double occupancy spectrum for different initial conditions. In particular, we numerically observe a striking narrowing of the width of the spectrum for increasing imbalance. Using Bethe-ansatz equations in the strongly interacting limit, we show that the width relates directly to the FFLO wave vector q.

Original languageEnglish
Article number236402
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Volume104
Issue number23
DOIs
Publication statusPublished - 10 Jun 2010
MoE publication typeA1 Journal article-refereed

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