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arXiv · 0706.0609

Molecular superfluid phase in systems of one-dimensional multicomponent fermionic cold atoms

S. Capponi·G. Roux·P. Lecheminant·P. Azaria·E. Boulat·S. R. White
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Abstract

We study a simple model of N-component fermions with contact interactions which describes fermionic atoms with N=2F+1 hyperfine states loaded into a one-dimensional optical lattice. We show by means of analytical and numerical approaches that, for attractive interaction, a quasi-long-range molecular superfluid phase emerges at low density. In such a phase, the pairing instability is strongly suppressed and the leading instability is formed from bound-states made of N fermions. At small density, the molecular superfluid phase is generic and exists for a wide range of attractive contact interactions without an SU(N) symmetry between the hyperfine states.

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S. Capponi, G. Roux, P. Lecheminant, P. Azaria, E. Boulat, S. R. White. 2007-06-05. Molecular superfluid phase in systems of one-dimensional multicomponent fermionic cold atoms. https://doi.org/10.1103/physreva.77.013624

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