Interaction Effects on Wannier Functions for Bosons in Optical Lattice
Quantum Gases
2016-10-31 v1
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)].
Keywords
Cite
@article{arxiv.1506.08053,
title = {Interaction Effects on Wannier Functions for Bosons in Optical Lattice},
author = {Shaoqi Zhu and Biao Wu},
journal= {arXiv preprint arXiv:1506.08053},
year = {2016}
}