Nonlocal quantum fluctuations and fermionic superfluidity in the imbalanced attractive hubbard model

M. O J Heikkinen*, D. H. Kim, M. Troyer, P. Törmä

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

17 Citations (Scopus)
245 Downloads (Pure)

Abstract

We study fermionic superfluidity in strongly anisotropic optical lattices with attractive interactions utilizing the cluster dynamical mean-field theory method, and focusing in particular on the role of nonlocal quantum fluctuations. We show that nonlocal quantum fluctuations impact the BCS superfluid transition dramatically. Moreover, we show that exotic superfluid states with a delicate order parameter structure, such as the Fulde-Ferrell-Larkin-Ovchinnikov phase driven by spin population imbalance, can emerge even in the presence of such strong fluctuations.

Original languageEnglish
Article number185301
Pages (from-to)1-5
Number of pages5
JournalPhysical Review Letters
Volume113
Issue number18
DOIs
Publication statusPublished - 30 Oct 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • cluster DMFT
  • Hubbard model
  • quantum gases
  • superfluidity

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