Ye Ying-Chen, Li Qian-Cheng, Yang Tian-Le, Xu Ye-Jun
Opt Express. 2024 Oct 7;32(21):36907-36917. doi: 10.1364/OE.537202.
We study phase-controlled quantum entanglement and one-way quantum steering in a cavity magnonic system, where two magnon modes couple to two microwave cavities driven by squeezed fields. The magnon-magnon entanglement and the steering directivity can be controlled by adjusting the ratio of the coupling strengths between cavity modes and magnon modes. In particular, the quantum entanglement and one-way quantum steering can be significantly enhanced by the squeezed vacuum field, which also exhibits robustness against temperature variations. More intriguingly, both quantum entanglement and steering between two magnon modes are susceptible to variations in the phase difference of two Josephson parametric amplifiers, and thus the phase-controlled quantum entanglement and one-way quantum steering can be achieved. Our scheme may have potential applications in quantum information.
我们研究了腔磁振子系统中的相位控制量子纠缠和单向量子导引，其中两个磁振子模式与由压缩场驱动的两个微波腔耦合。磁振子 - 磁振子纠缠和导引方向性可以通过调整腔模式与磁振子模式之间的耦合强度比来控制。特别地，压缩真空场可以显著增强量子纠缠和单向量子导引，并且它对温度变化也表现出鲁棒性。更有趣的是，两个磁振子模式之间的量子纠缠和导引都容易受到两个约瑟夫森参量放大器相位差变化的影响，因此可以实现相位控制的量子纠缠和单向量子导引。我们的方案可能在量子信息中有潜在应用。
