Cold atoms in real-space optical lattices
Abstract
Cold atoms in optical lattices are described in {\it real space} by multi-orbital mean-field Ans\"atze. In this work we consider four typical systems: (i) spinless identical bosons, (ii) spinor identical bosons (iii), Bose-Bose mixtures, and (iv) Bose-Fermi mixtures and derive in each case the corresponding multi-orbital mean-field energy-functional and working equations. The notions of {\it dressed} Wannier functions and Wannier spinors are introduced and the equations defining them are presented and discussed. The dressed Wannier functions are the set of orthogonal, translationally-equivalent orbitals which minimizes the energy of the Hamiltonian including boson-boson (particle-particle) interactions. Illustrative examples of dressed Wannier functions are provided for spinless bosonic atoms and mixtures in one-dimensional optical lattices.
Cite
@article{arxiv.cond-mat/0612170,
title = {Cold atoms in real-space optical lattices},
author = {Ofir E. Alon and Alexej I. Streltsov and Lorenz S. Cederbaum},
journal= {arXiv preprint arXiv:cond-mat/0612170},
year = {2007}
}
Comments
27 pages, 4 figures; [version minus figures published]