Superfluid phases of fermions with hybridized s and p orbitals

Shaoyu Yin, Jildou E. Baarsma, Miikka Heikkinen, Jani-Petri Martikainen, P. Törmä

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)
434 Downloads (Pure)

Abstract

We explore the superfluid phases of a two-component Fermi mixture with hybridized orbitals in optical lattices. We show that there exists a general mapping of this system to the Lieb lattice. By using simple multiband models with hopping between s- and p-orbital states, we show that superfluid order parameters can have a π-phase difference between lattice sites, which is distinct from the case with hopping between s orbitals. If the population imbalance between the two spin species is tuned, the superfluid phase may evolve through various phases due to the interplay between hopping, interactions, and imbalance. We show that the rich behavior is observable in experimentally realizable systems.

Original languageEnglish
Article number053616
Pages (from-to)1-12
Number of pages12
JournalPhysical Review A
Volume92
Issue number5
DOIs
Publication statusPublished - 17 Nov 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • Multiband Superfluidity
  • Optical lattices
  • Ultracold atoms

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