论文标题
纠缠仪：干涉仪中单副本的纠缠估算
Entanglement Meter: Estimation of entanglement with single copy in Interferometer
论文作者
论文摘要
复合系统的高维纠缠的有效认证和量化在理论上和实验上都在挑战。在这里，我们证明可以在Mach-Zehnder的干涉测量设置中有效地实施几种纠缠检测方法。特别是，我们演示了如何使用输入状态的单个副本来测量马赫 - 泽尔德干涉仪的可见性的两分系统的负熵和负面性。我们的结果表明，对于任何两个Qubit纯二分状态，干扰可见性是纠缠的直接度量。我们还建议如何从干涉设置的强度模式实验中测量相互可预测性，而不必诉诸于相互无偏基的局部测量。此外，我们表明可以在干扰设置中测量纠缠证人操作员，并且相位转移对国家的可分离或纠缠性敏感。我们的建议阐明了干涉计量学设置在纠缠纯净和几种混合状态的纠缠检测中的力量，这些状态铺平了纠缠仪表的设计。
Efficient certification and quantification of high dimensional entanglement of composite systems are challenging both theoretically as well as experimentally. Here, we demonstrate that several entanglement detection methods can be implemented efficiently in a Mach-Zehnder Interferometric set-up. In particular, we demonstrate how to measure the linear entropy and the negativity of bipartite systems from the visibility of Mach-Zehnder interferometer using single copy of the input state. Our result shows that for any two qubit pure bipartite state, the interference visibility is a direct measure of entanglement. We also propose how to measure the mutual predictability experimentally from the intensity patterns of the interferometric set-up without having to resort to local measurements of mutually unbiased bases. Furthermore, we show that the entanglement witness operator can be measured in a interference setup and the phase shift is sensitive to the separable or entangled nature of the state. Our proposals bring out the power of Interferometric set-up in entanglement detection of pure and several mixed states which paves the way towards design of entanglement meter.
