Trionic and quartetting phases in one-dimensional multicomponent ultracold fermions

Details Trionic and quartetting phases in one-dimensional multicomponent ultracold fermions Trionic and quartetting phases in one-dimensional multicomponent ultracold fermions

2008-06-16

arxiv.org/abs/0806.2556v1

Int. J. Mod. Phys. E 17, 2110 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

Contribution to the SOTANCP 2008 workshop

Scientific paper

10.1142/S0218301308011185

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.

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