Stability of Bose-Einstein condensates in a double-well potential |
| |
Authors: | R. Ichihara I. Danshita K. Egawa T. Nikuni |
| |
Affiliation: | (1) Department of Physics, Waseda University, Shinjuku-ku, Tokyo 169-8555, Japan;(2) Joint Quantum Institute, National Institute of Standards and Technology, and University of Maryland, Gaithersburg, Maryland 20899, USA;(3) Department of Physics, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan |
| |
Abstract: | We investigate the stability of the first excited state, the so-called “π-state,” of Bose-Einstein condensates in a double-well potential. From the condition of complex excitation energies, we determine the critical barrier height, above which the π-state is dynamically unstable. We find that the critical barrier height decreases monotonically as the number of condensate atoms increases. We also simulate the dynamics of the π-state by solving the time-dependent Gross-Pitaevskii equation. Our simulation results show that the π-state in the dynamically unstable region exhibits distinctively different behavior from that in the dynamically stable region. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|