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arXiv · 1506.08053

Interaction Effects on Wannier Functions for Bosons in Optical Lattice

Shaoqi Zhu·Biao Wu
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Abstract

We have numerically calculated the single band Wannier functions for interacting Bose gases in optical lattices with a self-consistent approach. We find that the Wannier function is broadened by repulsive atom interaction. The tunneling parameter J and on-site interaction U computed with the broadened Wannier functions are found to change significantly for different atomic number per site. Our theory can explain the nonuniform atomic clock shift observed in [Campbell et al., Science 313, 649 (2006)].

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Shaoqi Zhu, Biao Wu. 2015-06-26. Interaction Effects on Wannier Functions for Bosons in Optical Lattice. https://doi.org/10.1103/physreva.92.063637

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