Abstract
We study the exact solution for two atomic particles in an optical lattice interacting via a Feshbach resonance. The analysis includes the influence of all higher bands, as well as the proper renormalization of molecular energy in the closed channel. This exact solution allows for the precise determination of the parameters in the Hubbard model and the two-particle bound state energy. We identify the regime, where a single band Hubbard model fails to describe the scattering properties of the atoms as well as the bound states energies.
- Received 7 December 2009
DOI:https://doi.org/10.1103/PhysRevLett.104.090402
©2010 American Physical Society
Erratum
Erratum: Microscopic Derivation of Hubbard Parameters for Cold Atomic Gases [Phys. Rev. Lett. 104, 090402 (2010)]
Hans Peter Büchler
Phys. Rev. Lett. 108, 069903 (2012)
Synopsis
Hubbard model for ultracold atoms
Published 15 March 2010
A well-known model in condensed matter physics has now been applied to ultracold atoms in an optical lattice.
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