Probing Mott lobes via the AC Josephson effect
Quantum Physics
2008-03-09 v2 Strongly Correlated Electrons
Abstract
The alternating-current (AC) Josephson effect is studied in a system consisting of two weakly coupled Bose Hubbard models. In the framework of the mean field theory, Gross-Pitaevskii equations show that the amplitude of the Josephson current is proportional to the product of superfluid order parameters. In addition, the chemical potential--current relation for a small size system is obtained via the exact numerical computation. This allows us to propose a feasible experimental scheme to measure the Mott lobes of the quantum phase transition.
Keywords
Cite
@article{arxiv.0803.0059,
title = {Probing Mott lobes via the AC Josephson effect},
author = {M. X. Huo and Ying Li and Z. Song and C. P. Sun},
journal= {arXiv preprint arXiv:0803.0059},
year = {2008}
}
Comments
5 pages, 4 figures