Ge Ping-Chi, Yu Yikyung, Wu Hao-Tian, Han Xue, Wang Hong-Fu, Zhang Shou
Department of Physics, College of Science, Yanbian University, Yanji, 133002, Jilin, China.
Department of Energy Science and Engineering, Stanford University, Stanford, CA, 94305, USA.
Sci Rep. 2025 Mar 7;15(1):7937. doi: 10.1038/s41598-025-91813-3.
We theoretically propose a scheme for generating nonreciprocal macroscopic bipartite and tripartite entanglement using the Barnett effect in cavity-magnon optomechanics. The system consists of an optomechanical cavity and a rotatable yttrium iron garnet (YIG) sphere. Our results indicate that under appropriate parameter conditions, both bipartite entanglement and genuine tripartite entanglement can be generated between the cavity mode, mechanical mode, and magnon mode. Moreover, when the YIG sphere rotates, adjusting the magnetic field direction can induce a positive or negative Barnett shift, which leads to the nonreciprocity of entanglement, where entanglement exists in one chosen magnetic field direction and disappears in the other. Meanwhile, the macroscopic tripartite entanglement in the system is robust against thermal noise. Our work provides a possible avenue for quantum information processing, quantum chiral device integration, and multi-node quantum networks construction.
我们从理论上提出了一种利用腔磁子光机械中的巴尼特效应来产生非互易宏观二分体和三分体纠缠的方案。该系统由一个光机械腔和一个可旋转的钇铁石榴石（YIG）球体组成。我们的结果表明，在适当的参数条件下，腔模、机械模和磁子模之间既可以产生二分体纠缠，也可以产生真正的三分体纠缠。此外，当YIG球体旋转时，调整磁场方向可以诱导正或负的巴尼特频移，这会导致纠缠的非互易性，即在一个选定的磁场方向上存在纠缠，而在另一个方向上消失。同时，系统中的宏观三分体纠缠对热噪声具有鲁棒性。我们的工作为量子信息处理、量子手性器件集成和多节点量子网络构建提供了一条可能的途径。
