The role of inter-well tunnelling strength on coherence dynamics of two-species Bose–Einstein condensates

Li-Hua Lu, Xiao-Qiang Xu, You-Quan Li
2011 Journal of Physics B: Atomic, Molecular and Optical Physics  
Coherence dynamics of two-species Bose-Einstein condensates in double wells is investigated in mean field approximation. We show that the system can exhibit decoherence phenomena even without the condensate-environment coupling and the variation tendency of the degree of coherence depends on not only the parameters of the system but also the initial states. We also investigate the time evolution of the degree of coherence for a Rosen-Zener form of tunneling strength, and propose a method to get
more » ... ose a method to get a condensate system with certain degree of coherence through a time-dependent tunneling strength.
doi:10.1088/0953-4075/44/14/145301 fatcat:rcpli7jsp5fztbinwkcctz2i5i