Nonadiabatic multichannel dynamics of a spin-orbit coupled condensate
Bo Xiong1,2*, Junhui Zheng1, Daw-wei Wang1,3
1Department of Physics, Tsinghua University, Hsinchu, Taiwan
2Institute for Advanced Study, Tsinghua University, Beijing, China
3Institute of Physics, National Center for Theoretical Science, Hsinchu, Taiwan
* presenting author:Bo Xiong,
We systematically investigate the nonadiabatic dynamics of a driven spin-orbit coupled Bose-Einstein condensate, and find that the standard Landau-Zener (LZ) tunneling fails in the regime of weak driven force and/or strong spin-orbital coupling. We show both analytically and numerically that the full nonadiabatic dynamics requires a new mechanism through multichannel quantum interference, which is beyond semi-classical approach and provides an oscillating power-law decay in the long time limit. Furthermore, the condensate density profile is found to be dynamically fragmented by the multichannel effects and enhanced by interaction effects. Experimental indication of these nonadiabatic dynamics is discussed.

Keywords: Nonadiabatic dynamics, Multi-channel effect, Landau-Zener mechanism