玻色-爱因斯坦凝聚体在三势阱中的STIRAP输运
STIRAP transport of Bose-Einstein condensate in triple-well trap
摘要：
利用受激绝热拉曼通道（STIRAP）方案研究了多组分玻色-爱因斯坦凝聚体（BEC）的不可逆输运。导出了M阱中单个BEC的一般形式，并证明了多光子过程与隧穿过程的相似性。研究了BEC原子在周期性三阱阱中的STIRAP输运过程。结果表明，STIRAP在零失调和相互作用下提供了完整的人口转移，并持续保持在其适度的值。失谐被发现不是强制性的。非绝热运输的可能性与直观的顺序耦合证明。考察了凝聚相的演化以及动力相和几何相的产生。它表明，STIRAP允许产生非常规的几何相位，这是现在的量子计算的浓厚兴趣。
英文摘要：
The irreversible transport of multi-component Bose-Einstein condensate (BEC) is investigated within the Stimulated Adiabatic Raman Passage (STIRAP) scheme. A general formalism for a single BEC in M-well trap is derived and analogy between multi-photon and tunneling processes is demonstrated. STIRAP transport of BEC in a cyclic triple-well trap is explored for various values of detuning and interaction between BEC atoms. It is shown that STIRAP provides a complete population transfer at zero detuning and interaction and persists at their modest values. The detuning is found not to be obligatory. The possibility of non-adiabatic transport with intuitive order of couplings is demonstrated. Evolution of the condensate phases and generation of dynamical and geometric phases are inspected. It is shown that STIRAP allows to generate the unconventional geometrical phase which is now of a keen interest in quantum computing.
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