Autor:	Huo, M. X., Li, Ying, Song, Z., Sun, C. P.
Rok vydání:	2008
Předmět:	Quantum Physics Condensed Matter - Strongly Correlated Electrons
Druh dokumentu:	Working Paper
Popis:	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. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0803.0059 Zobrazit plný text záznamu View this record from Arxiv