论文标题
挤压驾驶诱导的纠缠和挤压模式和镁模式之间的纠缠和挤压QED系统
Squeezed driving induced entanglement and squeezing among cavity modes and magnon mode in a magnon-cavity QED system
论文作者
论文摘要
我们提出了一个方案，以在镁腔QED系统中产生纠缠和挤压镁模式，在该系统中，两个微波腔模式与磁性偶极相互作用的大量Yttrium Iron Garnet（YIG）球耦合。我们系统中使用的非线性源于通过参数下转换过程进行挤压驾驶，这是引起纠缠和挤压的原因。通过使用平均场近似并采用实验可行的参数，我们证明系统显示零纠缠和挤压而没有挤压驾驶。同时，我们的QED系统表示挤压腔模式与磁通模式之间的纠缠可以通过镁腔耦合相互作用传递到其他腔模式和镁模式，然后两个腔模式被纠缠。形成了真正的三方纠缠状态。我们还表明，可以通过镁腔束 - 裂口 - 分机相互作用在挤压状态下制备镁模式，这是由于挤压场的结果。此外，我们表明这是通过增加挤压驾驶的非线性增益系数来增强纠缠和挤压的好方法。我们的结果表明，镁载体QED系统是研究宏观量子现象的强大平台，该平台说明了一种新的光子 - 光子纠缠和镁挤压的方法。
We propose a scheme to generate entanglement between two cavity modes and squeeze magnon mode in a magnon-cavity QED system, where the two microwave cavity modes are coupled with a massive yttrium iron garnet (YIG) sphere through magnetic dipole interaction. The nonlinearity used in our system originates from a squeezed driving via parametric down-conversion process, which is the reason to cause entanglement and squeezing. By using the mean field approximation and employing experimentally feasible parameters, we demonstrate that the system shows zero entanglement and squeezing without squeezed driving. Meanwhile, our QED system denotes that the entanglement between squeezed cavity mode and magnon mode can be transferred to the other cavity mode and magnon mode via magnon-cavity coupling interaction, and then the two cavity modes get entangled. A genuinely tripartite entangled state is formed. We also show that magnon mode can be prepared in a squeezed state via magnon-cavity beam-splitter interaction, which is as a result of the squeezed field. Moreover, we show that it is a good way to enhance entanglement and squeezing by increasing the nonlinear gain coefficient of squeezed driving. Our results denote that magnon-cavity QED system is a powerful platform for studying macroscopic quantum phenomena, which illustrates a new method to photon-photon entanglement and magnon squeezing.
