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arXiv quant-ph/0306187quant-ph
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原子系综中集体激发的绝热通过

Adiabatic passage of collective excitations in atomic ensembles

Y. Li, Y. X. Miao, C. P. Sun

摘要:

我们描述了一个理论方案,允许转移的量子态的原子集体激发之间的两个宏观原子系综定位在两个空间分离的域。这个概念是基于双激子暗态的发生,由于从两个原子系综的发射的集体破坏性量子干涉。利用受激拉曼散射对原子与光场耦合进行相干操作,暗态将从一个系综的激子态外推到另一个系综的激子态。这实现了原子系综之间量子信息的传输。

英文摘要:

We describe a theoretical scheme that allows for transfer of quantum states of atomic collective excitation between two macroscopic atomic ensembles localized in two spatially-separated domains. The conception is based on the occurrence of double-exciton dark states due to the collective destructive quantum interference of the emissions from the two atomic ensembles. With an adiabatically coherence manipulation for the atom-field couplings by stimulated Ramann scattering, the dark states will extrapolate from an exciton state of an ensemble to that of another. This realizes the transport of quantum information among atomic ensembles.

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