Double occupancies in confined attractive fermions on optical lattices

Details Double occupancies in confined attractive fermions on optical lattices Double occupancies in confined attractive fermions on optical lattices

2010-03-02

arxiv.org/abs/1003.0506v1

Phys. Rev. A 81, 045602 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, submitted

Scientific paper

We perform a numerical study of a one-dimensional Fermion-Hubbard model in harmonic traps within the Thomas-Fermi approximation based on the exact Bethe-ansatz solution. The $\rho-U/t$ phase diagram is shown for the systems of attractive interactions ($\rho$ is the characteristic density and $U/t$ the interaction strength scaled in units of the hopping parameter.). We study the double occupancy, the local central density and their derivatives. Their roles are discussed in details in detecting the composite phases induced by the trapping potential.

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