The Macroscopic Quantum Phase of Ultracold Degenerate Gases in the Asymmetrical Two-Dimensional Magnetic Lattice

Authors

Ahmed M. Abdelrahman, Edith Cowan University
Mikhail Vasiliev, Edith Cowan UniversityFollow
Kamal Alameh, Edith Cowan UniversityFollow

Document Type

Journal Article

Publisher

Pergamon

Faculty

Faculty of Computing, Health and Science

School

Electron Science Research Institute (ESRI)

RAS ID

12384

Comments

Abdelrahman, A. , Vasiliev, M. , & Alameh, K. (2011). The macroscopic quantum phase of ultracold degenerate gases in the asymmetrical two-dimensional magnetic lattice. Solid State Communications, 151(11), 859-863. Available here

Abstract

We investigate the existence of the macroscopic quantum phase in trapped ultracold quantum degenerate gases in an asymmetrical two-dimensional magnetic lattice. We show the key to adiabatically control the tunneling in the new two-dimensional magnetic lattice by means of external magnetic bias fields. In solving the system of coupled time-dependent differential equations, described here by the Boson Josephson Junctions (BJJs), we used an order parameter that includes both time-dependent variational parameters to describe the fractional population at each lattice site and the phase difference to quantify the macroscopic quantum phase signature. A dynamical oscillation of the fractional population and the phase difference at each individual lattice site is observed when solving the BJJs system.

DOI

10.1016/j.ssc.2011.03.010

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