One-dimensional two-orbital SU(N) ultracold fermionic quantum gases at incommensurate filling: a low-energy approach

Abstract

We investigate the zero-temperature phase diagram of two-orbital SU(N) fermionic models at incommensurate filling which are directly relevant to strontium and ytterbium ultracold atoms loading into a one-dimensional optical lattice. Using a low-energy approach that takes into account explicitly the SU(N) symmetry, we find that a spectral gap for the nuclear-spin degrees of freedom is formed for generic interactions. Several phases with one or two gapless modes are then stabilized which describe the competition between different density instabilities. In stark contrast to the N=2 case, no dominant pairing instabilities emerge and the leading superfluid one is rather formed from bound states of 2N fermions.

arXiv comment11 pages, 4 figures

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Cited by in corpus (9)

• Non-perturbative methodologies for low-dimensional strongly-correlated systems: From non-abelian bosonization to truncated spectrum methods
• Symmetry-protected topological states for interacting fermions in alkaline-earth-like atoms
• Non-Topological Majorana Zero Modes in Inhomogeneous Spin Ladders
• Repulsive polarons in alkaline-earth(-like) atoms across an orbital Feshbach resonance
• Quantum Defect Theory for Orbital Feshbach Resonance
• Simulating artificial one-dimensional physics with ultra-cold fermionic atoms: three exemplary themes
• Interaction-induced exotic vortex states in an optical lattice clock with spin-orbit coupling
• Spin liquid state in an inhomogeneous periodic Anderson model
• Topological phases protected by projective space-time inversion symmetry in alkaline-earth-metal-like atoms