Superfluid phases of fermions with hybridized s and p orbitals

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2015-11-17
Major/Subject
Mcode
Degree programme
Language
en
Pages
12
1-12
Series
Physical Review A, Volume 92, issue 5
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.
Description
Keywords
Multiband Superfluidity, Optical lattices, Ultracold atoms
Other note
Citation
Yin , S , Baarsma , J E , Heikkinen , M , Martikainen , J-P & Törmä , P 2015 , ' Superfluid phases of fermions with hybridized s and p orbitals ' , Physical Review A , vol. 92 , no. 5 , 053616 , pp. 1-12 . https://doi.org/10.1103/PhysRevA.92.053616