Phase diagram of imbalanced strongly interacting fermions on a one-dimensional optical lattice

Details Phase diagram of imbalanced strongly interacting fermions on a one-dimensional optical lattice Phase diagram of imbalanced strongly interacting fermions on a one-dimensional optical lattice

2009-04-24

arxiv.org/abs/0904.3892v2

Phys. Rev. A 80, 043602 (2009)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.80.043602

We show that the Hubbard Hamiltonian with particle-assisted tunneling rates --recently proposed to model a fermionic mixture near a broad Feshbach resonance-- displays a ground state phase diagram with superfluid, insulating, and phase separated regimes. In the latter case, when the populations are balanced the two phases coexist in microscopic antiferromagnetic domains. Macroscopic phase segregation into a high-density superfluid of molecules, and a low-density Fermi liquid of single atoms appears in the density profile above a critical polarization p_c.

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