Probing Mott lobes via the AC Josephson effect

2008/03/01 by M. X. Huo, Mingxia Huo, Huo, M. X. +7
Economics, Econometrics and Finance · Physics and Astronomy · #Atomic and Subatomic Physics Research #Complex Systems and Time Series Analysis #Physics of Superconductivity and Magnetism #cond-mat.str-el #quant-ph

paper · pdf · doi:10.48550/arxiv.0803.0059

5 pages, 4 figures

arxiv created 2008/03/04 · arxiv updated 2009/12/01

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.

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