Topology Induced Spatial Bose-Einstein Condensation for Bosons on Star-Shaped Optical Networks
Statistical Mechanics
2007-05-23 v1
Abstract
New coherent states may be induced by pertinently engineering the topology of a network. As an example, we consider the properties of non-interacting bosons on a star network, which may be realized with a dilute atomic gas in a star-shaped deep optical lattice. The ground state is localized around the star center and it is macroscopically occupied below the Bose-Einstein condensation temperature T_c. We show that T_c depends only on the number of the star arms and on the Josephson energy of the bosonic Josephson junctions and that the non-condensate fraction is simply given by the reduced temperature T/T_c.
Keywords
Cite
@article{arxiv.cond-mat/0404500,
title = {Topology Induced Spatial Bose-Einstein Condensation for Bosons on Star-Shaped Optical Networks},
author = {I. Brunelli and G. Giusiano and F. P. Mancini and P. Sodano and A. Trombettoni},
journal= {arXiv preprint arXiv:cond-mat/0404500},
year = {2007}
}
Comments
20 Pages, 5 Figures