Interaction effects on Wannier functions for bosons in an optical lattice
- 30 December 2015
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 92 (6), 063637
- https://doi.org/10.1103/physreva.92.063637
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 functions are broadened by repulsive interaction. The tunneling parameter and the on-site interaction computed with the broadened Wannier functions are found to change significantly with the number of atoms per site. Our theory can explain the nonuniform atomic clock shift observed in Campbell et al., Science 313, 649 (2006).
Keywords
Funding Information
- National Natural Science Foundation of China (11429402, 11334001, 11274024)
This publication has 22 references indexed in Scilit:
- Ab initiodetermination of Bose-Hubbard parameters for two ultracold atoms in an optical lattice using a three-well potentialPhysical Review A, 2009
- Cold bosons in optical latticesLaser Physics, 2009
- Many-body physics with ultracold gasesReviews of Modern Physics, 2008
- Interaction broadening of Wannier functions and Mott transitions in atomic BECNew Journal of Physics, 2006
- Multiconfigurational Hartree-Fock theory for identical bosons in a double wellPhysical Review A, 2005
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atomsNature, 2002
- Cold Bosonic Atoms in Optical LatticesPhysical Review Letters, 1998
- Maximally localized generalized Wannier functions for composite energy bandsPhysical Review B, 1997
- Construction of Wannier Functions and Applications to Energy BandsPhysical Review B, 1973
- The Structure of Electronic Excitation Levels in Insulating CrystalsPhysical Review B, 1937