论文标题
通过局部测量的连续变量系统中量子相同步的标准
Criterion of Quantum Phase Synchronization in Continuous Variable Systems by Local Measurement
论文作者
论文摘要
事实证明，相位同步在量子水平上是不受限的，但是相位同步的见证人总是昂贵的量子资源和涉及的非本地测量值。基于量子不确定性关系，我们在本文中构建了两个相同步的局部标准。局部标准表明，量子水平的相位同步只能通过局部测量来见证，并且在光学机学系统中以数值方式对扣除进行了验证。此外，通过分析量子级别同步相同步的物理本质，我们表明一个人可以准备一个状态，该状态描述了两个同步的振荡器，它们之间没有纠缠。因此，在理想相同步的发生时，纠缠资源是不需要的，也讨论了这种现象的原因。
Phase synchronization was proved to be unbounded in quantum level, but the witness of phase synchronization is always expensive in terms of the quantum resource and non-local measurements involved. Based on the quantum uncertainty relation, we construct two local criterions for the phase synchronization in this paper. The local criterions indicate that the phase synchronization in the quantum level can be witnessed only by the local measurements, and the deduction has been verified in the optomechanics system in numerical way. Besides, by analyzing the physical essence of the phase synchronization in quantum level, we show that one can prepare a state, which describes two synchronized oscillators with no entanglement between them. Thus, the entanglement resource is not necessary in the occurrence of the ideal phase synchronization, and also the reason for this phenomenon is discussed.
