Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-06-05
Phys. Rev. A 77, 013624 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
published version
Scientific paper
10.1103/PhysRevA.77.013624
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.
Azaria Patrick
Boulat Edouard
Capponi Sylvain
Lecheminant Ph.
Roux Guillaume
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