Nonequilibrium effects of anisotropic compression applied to vortex lattices in bose-einstein condensates |
| |
| Authors: | Engels P Coddington I Haljan P C Cornell E A |
| |
| Institution: | JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder 80309-0440, USA. |
| |
| Abstract: | We have studied the dynamics of large vortex lattices in a dilute-gas Bose-Einstein condensate. While undisturbed lattices have a regular hexagonal structure, large-amplitude quadrupolar shape oscillations of the condensate are shown to induce a wealth of nonequilibrium lattice dynamics. When exciting an m=-2 mode, we observe shifting of lattice planes, changes of lattice structure, and sheetlike structures in which individual vortices appear to have merged. Excitation of an m=+2 mode dissolves the regular lattice, leading to randomly arranged but still strictly parallel vortex lines. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
