The macroscopic quantum phase of ultracold degenerate gases in the asymmetrical two-dimensional magnetic lattice |
| |
Authors: | A Abdelrahman M Vasiliev K Alameh |
| |
Institution: | Electron Science Research Institute, Edith Cowan University, 270 Joondalup Drive, Joondalup WA 6027, Australia |
| |
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. |
| |
Keywords: | D Quantum localization D Spin dynamics D Tunnelling D Phase transitions |
本文献已被 ScienceDirect 等数据库收录! |