Dissipative Preparation of Entanglement in Optical Cavities
Dissipative Preparation of Entanglement in Optical Cavities
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DOI：
10.1103/physrevlett.106.090502
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发表时间：
2011-02-28
影响因子：
8.6
通讯作者：
Sorensen, A. S.
中科院分区：
文献类型：
--
作者：
Kastoryano, M. J.;Reiter, F.;Sorensen, A. S.
提出了一种在光腔中制备两原子最大纠缠态的新方案。从任意初始态出发，构造了一个单重态作为耗散量子动力学过程的唯一不动点。在我们的方案中，腔衰减不再是不可取的，但在动力学中起着不可或缺的作用。结果，我们得到了质的改善，在缩放的保真度与腔参数。我们的分析表明，耗散态制备不仅仅是一个新的概念方法，但可以允许显着的改进相比，基于一致的单一动力学的制备协议。
We propose a novel scheme for the preparation of a maximally entangled state of two atoms in an optical cavity. Starting from an arbitrary initial state, a singlet state is prepared as the unique fixed point of a dissipative quantum dynamical process. In our scheme, cavity decay is no longer undesirable, but plays an integral part in the dynamics. As a result, we get a qualitative improvement in the scaling of the fidelity with the cavity parameters. Our analysis indicates that dissipative state preparation is more than just a new conceptual approach, but can allow for significant improvement as compared to preparation protocols based on coherent unitary dynamics.