论文标题
耦合的三模式挤压真空：高斯转向和偏远的Wigner负性
Coupled three-mode squeezed vacuum: Gaussian steering and remote generation of Wigner negativity
论文作者
论文摘要
多部分爱因斯坦 - 波多尔斯基 - 罗森（EPR）转向和多模量子挤压是各种量子应用的重要资源。该论文着重研究耦合的三模式挤压真空（C3MSV），该真空（C3MSV）是典型的多模挤压高斯状态，并将具有特殊的转向属性。使用有序产品中的集成技术，我们为耦合的三模式挤压操作员提供了正常订购形式，并得出了C3MSV统计量的一般分析表达式。在高斯测量值下，我们分析了所有详细信息（包括没有转向，单向转向和双向转向）的所有两部分高斯转向，并研究了C3MSV的一夫一妻制关系。然后，我们研究了所有这些转向在嘈杂的渠道中的破裂，并发现突然死亡将在一定的阈值时间内发生。通过在C3MSV中共享的转向，我们提出了通过在局部位置执行适当的光子减法（S）来远程产生Wigner负性（WN）的概念（和理想）方案。我们获得的结果可能为未来的实践研究奠定了扎实的理论基础。我们还认为，C3MSV将是未来量子协议中的良好候选资源之一。
Multipartite Einstein-Podolsky-Rosen (EPR) steering and multimode quantum squeezing are essential resources for various quantum applications. The paper focuses on studying a coupled three-mode squeezed vacuum (C3MSV), which is a typical multimode squeezed Gaussian state and will exhibit peculiar steering property. Using the technique of integration within ordered products, we give the normal-ordering form for the coupled three-mode squeezing operator and derive the general analytical expressions of the statistical quantities for the C3MSV. Under Gaussian measurements, we analyze all bipartite Gaussian steerings (including no steering, one-way steering and two-way steering) in details and study the monogamy relations for the C3MSV. Then, we study the decoherence of all these steerings in noisy channels and find that sudden death will happen in a certain threshold time. Through the steerings shared in the C3MSV, we propose conceptual (and ideal) schemes of remotely generating Wigner negativity (WN) by performing appropriate photon subtraction(s) in the local position. Our obtained results may lay a solid theoretical foundation for a future practical study. We also believe that the C3MSV will be one of good candidate resources in future quantum protocols.
