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发布者： admin技术支持 发布时间：2010-03-21

　　

Wenxian Zhang

(Department of Physics and Astronomy, Dartmouth College, USA)
11:00am, Dec.10, 2007(Monday)
IOE Lecture Hall
 

 

Abstract
Multi-component Bose-Einstein condensate (BEC) is one of the hottest topics nowadays in atomic/molecular and optical physics. I discuss the ground state of the spin-1 BEC (3 components) in magnetic fields, as well as the dynamics under single spatial mode approximation. Then I focus on the analysis of the dynamical stabilities and the spontaneous spin domain formation in ferromag-netically interacting spin-1 BEC.
Besides the topic of spin-1 BEC, I would like also to cover the decoherence process of an electron spin in a quantum dot, through hyperfine interaction with its surrounding nuclear spins. By employing dynamical decoupling method, we show numerically that the coherence time of the electron spin can be extended more than 1000 times. Experimental feasibility is also considered.