论文标题
稳定的纠缠状态通过跨kerr效应在铁磁晶体中
Steady entangled-state generation via cross-Kerr effect in a ferrimagnetic crystal
论文作者
论文摘要
对于固态自旋系统，单晶中的集体自旋运动体现了多种磁静态模式。最近，发现高阶磁静力模式与Kittel模式之间的跨kerr相互作用引入了新的可操作性自由度。在这项工作中，我们提出了一个方案，当偏置场不均匀并驱动系统时，通过横凯尔非线性纠缠了两种磁通模式。量子纠缠持续在稳定状态下，如使用实验可行的参数的数值结果所证明的那样。此外，我们还证明，纠缠状态可以在自我kerr和Cross-kerr非线性并存的系统中生存得更好。我们的工作提供了设计实验的见解和指导，以观察单个铁磁性晶体内不同自由度之间的纠缠。此外，它可能会刺激使用Spintronic设备在量子信息处理中的潜在应用。
For solid-state spin systems, the collective spin motion in a single crystal embodies multiple magnetostatic modes. Recently, it was found that the cross-Kerr interaction between the higher-order magnetostatic mode and the Kittel mode introduces a new operable degree of freedom. In this work, we propose a scheme to entangle two magnon modes via the cross-Kerr nonlinearity when the bias field is inhomogeneous and the system is driven. Quantum entanglement persists at the steady state, as demonstrated by numerical results using experimentally feasible parameters. Furthermore, we also demonstrate that entangled states can survive better in the system where self-Kerr and cross-Kerr nonlinearities coexist. Our work provides insights and guidance for designing experiments to observe entanglement between different degrees of freedom within a single ferrimagnetic crystal. Additionally, it may stimulate potential applications in quantum information processing using spintronic devices.
