论文标题
通过耗散在有限温度下捕获离子的工程稳定的纠缠
Engineering steady entanglement for trapped ions at finite temperature by dissipation
论文作者
论文摘要
我们提出了一种耗散方法，用于制备在羔羊dicke极限中的两个被困离子的最大纠缠稳态。通过用离子过渡的频率共振和与地面状态跃迁耦合的微波场谐振剂的单色站立波激光脉冲来解决被困的离子系统，我们在两个粒子之间获得了有效的耦合，这与声子 - 名称的波动无关。同时，通过将亚稳态状态通过辅助激光场向以上向上泵送到短暂的离子状态来实现捕获离子的自发发射。将统一过程与工程耗散相结合，无论系统的初始状态如何，都可以产生确定性的铃铛状态。此外，我们的结果表明，即使在有限温度下，也可能会违反CHSH不等式，即使在有限的温度下，也可能会违反CHSH不等式。
We propose a dissipative method for preparation of a maximally entangled steady state of two trapped ions in the Lamb-Dicke limit. By addressing the trapped-ion system with a monochromatic standing wave laser pulse of frequency resonant with the ionic transition and a microwave field coupled to the ground-state transitions, we obtain an effective coupling between two particles, which is independent of the phonon-number fluctuations. Meanwhile, the controlled spontaneous emission of trapped ions is implemented via pumping the metastable states upwards to the short-lived ionic states by an auxiliary laser field. Combining the unitary processes with the engineered dissipation, a deterministic Bell state can be produced irrespective of the initial states of systems. Moreover, our result shows that the CHSH inequality can be violated for a wide range of decoherence parameters, even at finite temperature.
