A scheme is proposed for the preparation of entangled states in a pair of cavities, including Knill–Lafamme–Milburn (KLM) states and Bell states. Success probabilities for preparation of entangled states are near unity. The numerical simulation result shows that this scheme has high fidelity and is robust against imperfect operation. The obvious advantage is both the KLM states and Bell states can be prepared by setting the Rabi frequencies of the classical laser field or the interaction time between atom and classical laser field, and therefore, this scheme has high controllability. Furthermore, the n -cavity entangled states could be prepared with the same principle, which provides a scalable way to prepare entangled states in theory.

中文翻译：

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在多个腔中制备纠缠态

提出了一种在一对空腔中制备纠缠态的方案，其中包括Knill–Lafamme–Milburn（KLM）态和Bell态。准备纠缠态的成功概率接近统一。数值仿真结果表明，该方案具有较高的保真度，并且对不完善的操作具有鲁棒性。明显的优点是，可以通过设置经典激光场的拉比频率或原子与经典激光场之间的相互作用时间来准备KLM状态和Bell状态，因此，该方案具有较高的可控性。此外，可以以相同的原理制备n腔纠缠态，这在理论上提供了可扩展的制备纠缠态的方法。