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Accueil du site > Publications > Publications 2008 > Molecular superfluid phase in systems of one-dimensional multicomponent fermionic cold atoms

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

par Sylvain Capponi - 12 juin 2007

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.