Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.87.043613
Title: Ab initio derivation of Hubbard models for cold atoms in optical lattices
Authors: Walters, R.
Cotugno, G.
Johnson, T.H.
Clark, S.R. 
Jaksch, D. 
Issue Date: 10-Apr-2013
Source: Walters, R., Cotugno, G., Johnson, T.H., Clark, S.R., Jaksch, D. (2013-04-10). Ab initio derivation of Hubbard models for cold atoms in optical lattices. Physical Review A - Atomic, Molecular, and Optical Physics 87 (4) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.87.043613
Abstract: We derive ab initio local Hubbard models for several optical-lattice potentials of current interest, including the honeycomb and kagome lattices, verifying their accuracy on each occasion by comparing the interpolated band structures against the originals. To achieve this, we calculate the maximally localized generalized Wannier basis by implementing the steepest-descent algorithm of Marzari and Vanderbilt directly in one and two dimensions. To avoid local minima we develop an initialization procedure that is both robust and requires no prior knowledge of the optimal Wannier basis. © 2013 American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/116208
ISSN: 10502947
DOI: 10.1103/PhysRevA.87.043613
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