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arXiv quant-ph/0203137quant-ph
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原子双量子比特态的纠缠与熵工程

Entanglement and entropy engineering of atomic two-qubit states

S. G. Clark, A. S. Parkins

摘要:

我们提出了一个利用量子库工程的方案来控制两个原子的内部态纠缠在一个高精细光学腔中。利用激光场和腔场驱动两个亚稳态原子基态之间的拉曼跃迁,实现了一个对应于一对两态原子集体耦合到压缩库的系统。相敏库关联导致原子之间的纠缠,并且,通过局域么正变换和压缩的程度和纯度的调整,可以制备具有任何允许的线性熵和形成纠缠的组合的纠缠混合态。

英文摘要:

We propose a scheme employing quantum-reservoir engineering to controllably entangle the internal states of two atoms trapped in a high finesse optical cavity. Using laser and cavity fields to drive two separate Raman transitions between metastable atomic ground states, a system is realized corresponding to a pair of two-state atoms coupled collectively to a squeezed reservoir. Phase-sensitive reservoir correlations lead to entanglement between the atoms, and, via local unitary transformations and adjustment of the degree and purity of squeezing, one can prepare entangled mixed states with any allowed combination of linear entropy and entanglement of formation.

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