Efficient entanglement criteria for discrete, continuous, and hybrid variables
Efficient entanglement criteria for discrete, continuous, and hybrid variables
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DOI：
10.1103/physreva.94.020101
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发表时间：
2016-08-01
影响因子：
2.9
通讯作者：
Smerzi, Augusto
中科院分区：
文献类型：
--
作者：
Gessner, Manuel;Pezze, Luca;Smerzi, Augusto
我们开发了一种为离散或连续变量以及两者混合组合的任意多部分系统构建纠缠准则的方法。虽然任何一组局部算子都会生成任意量子态纠缠的充分条件，但适当的一组算子会产生纯态的充分必要条件。这些标准很容易用现有技术来实现，并揭示了离散变量和连续变量各自最先进的方法仍未检测到的纠缠。
We develop a method to construct entanglement criteria for arbitrary multipartite systems of discrete or continuous variables and hybrid combinations of both. While any set of local operators generates a sufficient condition for entanglement of arbitrary quantum states, a suitable set leads to a necessary and sufficient criterion for pure states. The criteria are readily implementable with existing technology and reveal entanglement that remains undetected by the respective state-of-the-art methods for discrete and continuous variables.