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arXiv 2302.08684quant-phcond-mat.mes-hallphysics.atom-phphysics.optics
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通过光磁力学使亚铁磁磁振子与原子系综纠缠

Entangling ferrimagnetic magnons with an atomic ensemble via opto-magnomechanics

Zhi-Yuan Fan, Hang Qian, Xuan Zuo, Jie Li

发表信息：
Phys. Rev. A 108, 023501 (2023)
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AI总结：

本文提出在YIG晶体中利用光磁力学构型，通过光力与磁力冷却及参量下转换的协同作用，实现原子系综与磁振子的稳态宏观纠缠，并进一步展示原子、磁振子和声子的真正三体纠缠。

摘要：

我们展示了如何在亚铁磁YIG晶体中制备原子系综与大量磁振子之间的宏观纠缠。具体而言，我们采用一种光磁力学构型，其中磁致伸缩引起的磁力学位移通过辐射压与光学腔耦合，而光学腔进一步与置于腔内的二能级原子系综耦合。我们表明，通过适当驱动腔模和磁振子模，可以产生光力纠缠，并进一步分配到原子系统和磁振子系统，从而产生原子与磁振子之间的稳态纠缠。原子-磁振子纠缠是光力冷却、磁力冷却以及光力参量下转换相互作用共同作用的结果。我们揭示了一种两个机械冷却通道之间的竞争机制。我们进一步表明，在同一系统中还可以实现三个宏观子系统（即原子、磁振子和声子）之间的真正三体纠缠。我们的结果表明，这种混合光磁力学系统可能成为制备涉及磁振子、光子、声子和原子的宏观量子态的有前景的系统。

英文摘要：

We show how to prepare macroscopic entanglement between an atomic ensemble and a large number of magnons in a ferrimagnetic YIG crystal. Specifically, we adopt an opto-magnomechanical configuration where the magnetostriction-induced magnomechanical displacement couples to an optical cavity via radiation pressure, and the latter further couples to an ensemble of two-level atoms that are placed inside the cavity. We show that by properly driving the cavity and magnon modes, optomechanical entanglement is created which is further distributed to the atomic and magnonic systems, yielding stationary entanglement between atoms and magnons. The atom-magnon entanglement is a result of the combined effect of opto- and magnomechanical cooling and optomechanical parametric down-conversion interactions. A competition mechanism between two mechanical cooling channels is revealed. We further show that genuine tripartite entanglement of three massive subsystems, i.e., atoms, magnons and phonons, can also be achieved in the same system. Our results indicate that the hybrid opto-magnomechanical system may become a promising system for preparing macroscopic quantum states involving magnons, photons, phonons and atoms.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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