论文标题
单向爱因斯坦 - 波多尔斯基 - 罗森 - 罗森转向超越Qubits
One-way Einstein-Podolsky-Rosen steering beyond qubits
论文作者
论文摘要
量子转向已被利用为现代量子信息处理中的重要资源。由于其定向性质，在当事方交换下不对称的一些量子状态仅在特定方向上表现出来，因此称为单向转向。现有作品着重于Qubits系统中的单向转向。在这里，我们提出了一个两党国家的家庭，这些国家是单向$ d $ dimension的系统。特别是，我们以$ d = 3 $的形式验证了各州的单向可引导性，并演示了单向转向参数空间如何在两qutrit系统中表现出来。提供了一种表征高维单向转向的一般数值方法。此外，我们开发了一种描述单向转向的方法，并考虑了实验损失，并研究了在高维系统中转向测试中损失和测量设置之间的权衡关系。我们的损失计数模型适用于有限测量设置的有限维系统。
Quantum steering has been exploited as an important resource in modern quantum information processing. Owing to its directional nature, some quantum states that are asymmetric under the exchange of parties have been found to manifest steering only in specific direction, thus called one-way steering. Existing works focused on one-way steering in systems of qubits. Here we propose a family of two-party states that are one-way steerable in systems of $d$-dimension. In particular, we validate the one-way steerability of the states for $d=3$, and demonstrate how one-way steering parameter space manifests in two-qutrit system. A general numerical approach for characterizing higher-dimensional one-way steering is provided. Moreover, we develop a method to characterize one-way steering with the experimental loss taken into account, with which the tradeoff relation between losses and measurement settings in steering test in higher-dimensional system is investigated. Our loss-counted model works for finite-dimensional system with finite measurement settings.
