Molecular superfluid phase in one-dimensional multicomponent fermionic cold atoms

Sylvain Capponi (1, 2) , Guillaume Roux (1, 2) , P. Lecheminant (3) , P. Azaria (4) , E. Boulat (5) , S. R. White

1 FFC - Fermions Fortement Corrélés (LPT)
2 LPT - Laboratoire de Physique Théorique
3 LPTM - UMR 8089 - Laboratoire de Physique Théorique et Modélisation
4 LPTMC - Laboratoire de Physique Théorique de la Matière Condensée
5 MPQ (UMR_7162) - Laboratoire Matériaux et Phénomènes Quantiques

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.

Domaines: Autre [cond-mat.other]

Sylvain Capponi, Guillaume Roux, P. Lecheminant, P. Azaria, E. Boulat, et al.. Molecular superfluid phase in one-dimensional multicomponent fermionic cold atoms. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2008, 77 (1), pp.013624. ⟨10.1103/PhysRevA.77.013624⟩. ⟨hal-00152146⟩