论文标题
Einstein-Podolsky-Rosen的纠缠和遥远的宏观机械和宏伟系统之间的不对称转向
Einstein-Podolsky-Rosen entanglement and asymmetric steering between distant macroscopic mechanical and magnonic systems
论文作者
论文摘要
我们提出了一种确定性方案，用于在远处的yttrium-rgarnet（YIG）球体中建立宏观机械振荡器与磁通模式之间的混合爱因斯坦 - 纠缠通道（EPR）纠缠通道。该系统由一个驱动的机电腔组成，该腔位置在远处的电磁腔中单向耦合，放置了YIG球体。我们发现，在机电子系统中，可以实现固定的声子 - 马格诺EPR纠缠范围之外的侧带分辨状态。通过利用机电腔的输出场是将机电纠缠分配到镁质的中介，从而建立了远程声子 - 马格诺纠缠。 EPR纠缠足够强大，以至于可以以不对称的方式获得声子 - 马格诺量量子转向。这种长距离宏观混合EPR纠缠和转向不仅可以在宏观量表的量子力学的基本测试中进行潜在应用，而且还可以在量子网络和量子网络和基于宏伟的元素量子量大量子术中基于宏伟的量子和电气学。
We propose a deterministic scheme for establishing hybrid Einstein-Podolsky-Rosen (EPR) entanglement channel between a macroscopic mechanical oscillator and a magnon mode in a distant yttrium-iron-garnet (YIG) sphere across about ten gigahertz of frequency difference. The system consists of a driven electromechanical cavity which is unidirectionally coupled to a distant electromagnonical cavity inside which a YIG sphere is placed. We find that far beyond the sideband-resolved regime in the electromechanical subsystem, stationary phonon-magnon EPR entanglement can be achieved. This is realized by utilizing the output field of the electromechanical cavity being an intermediary which distributes the electromechanical entanglement to the magnons, thus establishing a remote phonon-magnon entanglement. The EPR entanglement is strong enough such that phonon-magnon quantum steering can be attainable in an asymmetric manner. This long-distance macroscopic hybrid EPR entanglement and steering enable potential applications not only in fundamental tests of quantum mechanics at the macro scale, but also in quantum networking and one-sided device-independent quantum cryptography based on magnonics and electromechanics.
