2015/08/31 by Shaoyu Yin, J. E. Baarsma, M. O. J. Heikkinen +4 · 15 citations
Physics and Astronomy · #Atomic orbital #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Fermion #Lattice (music) #Observable #Physics #Population #Quantum mechanics #Quantum, superfluid, helium dynamics #Statistical physics #Superfluidity #Topological Materials and Phenomena #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.92.053616
published in Physical Review A 92(5) (American Physical Society) · 13 pages, 11 figures. Published version
openalex publication_date 2015/11/17 · arxiv created 2015/11/26 · arxiv updated 2015/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 \ensuremathπ-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.