Magnon-Photon-Phonon Entanglement in Cavity Magnomechanics
Magnon-Photon-Phonon Entanglement in Cavity Magnomechanics
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DOI：
10.1103/physrevlett.121.203601
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发表时间：
2018-11-14
影响因子：
8.6
通讯作者：
Agarwal, G. S.
中科院分区：
文献类型：
--
作者：
Li, Jie;Zhu, Shi-Yao;Agarwal, G. S.
我们展示了如何在由磁振子、腔微波光子和声子组成的腔磁力学系统中产生三方纠缠。磁振子表现为宏观铁磁体中大量自旋的集体运动，并由电磁场直接驱动。腔内光子和磁偶极子通过磁致伸缩（类辐射压力）相互作用耦合，磁振子和声子通过磁致伸缩（类辐射压力）相互作用耦合。我们展示了实现磁振子、腔光子和声子相互纠缠的三方纠缠的最佳参数制度，并进一步证明了系统的稳态是真正的三方纠缠态。这种缠结在温度下很牢固。我们的研究结果表明，腔磁力学系统为宏观量子现象的研究提供了一个有希望的平台。
We show how to generate tripartite entanglement in a cavity magnomechanical system which consists of magnons, cavity microwave photons, and phonons. The magnons are embodied by a collective motion of a large number of spins in a macroscopic ferrimagnet, and are driven directly by an electromagnetic field. The cavity photons and magnons are coupled via magnetic dipole interaction, and the magnons and phonons are coupled via magnetostrictive (radiation pressurelike) interaction. We show optimal parameter regimes for achieving the tripartite entanglement where magnons, cavity photons, and phonons are entangled with each other, and we further prove that the steady state of the system is a genuinely tripartite entangled state. The entanglement is robust against temperature. Our results indicate that cavity magnomechanical systems could provide a promising platform for the study of macroscopic quantum phenomena.