Phys. Rev. A 80, 043602 (2009) [4 pages]Phase diagram of imbalanced strongly interacting fermions on a one-dimensional optical latticeReceived 24 April 2009; revised 20 May 2009; published 7 October 2009 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 pc. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.043602
DOI:
10.1103/PhysRevA.80.043602
PACS:
67.85.−d, 03.75.Ss, 05.30.Fk, 71.10.Fd
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