论文标题
基于动态的纠缠目击者的谐波振荡器的非高斯州
Dynamics-Based Entanglement Witnesses for Non-Gaussian States of Harmonic Oscillators
论文作者
论文摘要
我们介绍了一个连续变量系统的纠缠见证人家族，该系统依赖于唯一的假设，即它们的动态是测试时耦合的谐波振荡器的动力。纠缠是从tsirelson在一种正常模式之一上的非经典性测试中推断出来的，而对另一种模式的状态不了解。在每个回合中，协议只需要在几次中测量一个坐标（例如位置）的符号。这位基于动态的纠缠见证人更像是贝尔的不平等，而不是不确定性关系：特别是，它不承认经典理论的误报。我们的标准检测到非高斯州，其中一些国家被其他标准遗漏。
We introduce a family of entanglement witnesses for continuous variable systems, which rely on the sole assumption that their dynamics is that of coupled harmonic oscillators at the time of the test. Entanglement is inferred from the Tsirelson nonclassicality test on one of the normal modes, without any knowledge about the state of the other mode. In each round, the protocol requires measuring only the sign of one coordinate (e.g., position) at one among several times. This dynamic-based entanglement witness is more akin to a Bell inequality than to an uncertainty relation: in particular, it does not admit false positives from classical theory. Our criterion detects non-Gaussian states, some of which are missed by other criteria.
