Trionic and quartetting phases in one-dimensional multicomponent ultracold fermions

Abstract

We investigate the possible formation of a molecular condensate, which might be, for instance, the analogue of the alpha condensate of nuclear physics, in the context of multicomponent cold atoms fermionic systems. A simple paradigmatic model of N-component fermions with contact interactions loaded into a one-dimensional optical lattice is studied by means of low-energy and numerical approaches. For attractive interaction, a quasi-long-range molecular superfluid phase, formed from bound-states made of N fermions, emerges at low density. We show that trionic and quartetting phases, respectively for N=3,4, extend in a large domain of the phase diagram and are robust against small symmetry-breaking perturbations.

Contribution to the SOTANCP 2008 workshop

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Cited by in corpus (7)

• From one-dimensional charge conserving superconductors to the gapless Haldane phase
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• Interplay between exotic superfluidity and magnetism in a chain of four-component ultracold atoms
• Two-orbital physics of high spin fermionic alkaline earth atoms confined in a one-dimensional chain
• Interplay between intrinsic and emergent topological protection on interacting helical modes
• Kinetic formation of trimers in a spinless fermionic chain
• Fermion quartets on the square lattice