Test of Particle-Assisted Tunneling for Strongly Interacting Fermions in an Optical Superlattice
arXiv:0808.2072 · doi:10.1103/PhysRevA.79.023617
Abstract
Fermions in an optical lattice near a wide Feshbach resonance are expected to be described by an effective Hamiltonian of the general Hubbard model with particle-assisted tunneling rates resulting from the strong atomic interaction [Phys. Rev. Lett. 95, 243202 (2005)]. Here, we propose a scheme to unambiguously test the predictions of this effective Hamiltonian through manipulation of ultracold atoms in an inhomogeneous optical superlattice. The structure of the low-energy Hilbert space as well as the particle assisted tunneling rates can be inferred from measurements of the time-of-flight images.
arXiv comment4 pages, 4 figures
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