Superfluid phases of fermions with hybridized $s$ and $p$ orbitals

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 $\pi$-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.

arXiv comment13 pages, 11 figures. Published version

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Cited by in corpus (11)

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• Photonic quadrupole topological insulator using orbital-induced synthetic flux
• Experimental observation of inter-orbital coupling
• Topological and flat bands states induced by hybridized interactions in one-dimensional photonic lattices
• Observation of Ground and Excited Flat Band States in Graphene Photonic Ribbons
• Perfect localization on flat band binary one-dimensional photonic lattices
• Tailoring higher-order topological phases via orbital hybridization
• Ground state spin and excitation energies in half-filled Lieb lattices
• Effect of hybridization symmetry on topological phases of odd-parity multiband superconductors
• Enhancing long-range order in disordered two-band s-wave superconductors
• Observation of dipolar transport in one-dimensional photonic lattices