Improvement of entanglement via quantum scissors
Improvement of entanglement via quantum scissors
复制标题
通过量子剪刀改进纠缠
DOI：
10.1364/josab.35.000174
复制
发表时间：
2018
影响因子：
1.9
通讯作者：
Liao Zeyang
中科院分区：
文献类型：
--
作者：
Xu Xuexiang;Hu Liyun;Liao Zeyang
在Anisimov等人工作的基础上，提出了一种利用非确定性光学非线性放大实现双模压缩真空态纠缠蒸馏的理论方案。[物理。Lett.104,103602(2010)PRLTAO0031-900710.1103/PhysRevLett.104.103602].版本通过将量子剪刀操作应用于两种模式的TM VS，只有孪生真空和孪生单光子分量可以在所产生的态中存活。结果表明，在高透过率和低压缩区，纠缠和压缩都可以得到增强。此外，与对称单光子减法和量子催化的比较表明，在高透过率区，所提出的态可以实现比光子减法更好的纠缠增强，而在低透过率区，催化态也具有类似的性质。
We propose a theoretical scheme for entanglement distillation of the two-mode squeezed vacuum state (TMSVS) by nondeterministic optical nonlinear amplification based on the work of Anisimov et al. [Phys. Rev. Lett.104, 103602 (2010)PRLTAO0031-900710.1103/PhysRevLett.104.103602]. By applying the quantum-scissors operations to both modes of the TMSVS, only the twin vacuum and the twin one-photon components can survive in the resulting state. We show that both entanglement and squeezing can be enhanced in the high-transmissivity and low-squeezing region. In addition, a comparison with symmetrical single-photon subtraction and quantum catalysis shows that the proposed states can achieve a better entanglement enhancement than the photon subtraction in a high-transmissivity region, and a similar property is shared by the catalyzed states in low-transmissivity regions.