Measuring the magnon phase in a hybrid magnon-photon system

Zhao, Yue; Wang, Ledong; Xue, Jianshu; Zhang, Qi; Tian, Yue; Shen, Yan; Bai, Lihui; Harder, Michael; Guo, Qingjie; Zhai, Ya

doi:10.1103/physrevb.105.174405

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2023

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“…The hybrid systems composed of collective spins (magnons) in ferrimagnetic systems and other systems are able to constitute the magnon-photon [63,64], magnon-phonon [65][66][67], magnon-photon-phonon [49,50,68] systems and so on, giving rise to new interesting applications. Ferrimagnetic systems such as yttrium iron garnet (YIG) sphere have attracted considerable attention in recent years, which provide new platforms for investigating the macroscopic quantum phenomena particularly.…”

Section: Introductionmentioning

confidence: 99%

Quantum entanglement generation on magnons assisted with microwave cavities coupled to a superconducting qubit

Li¹,

Fei²

2023

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We present protocols to generate quantum entanglement on nonlocal magnons in hybrid systems composed of yttrium iron garnet (YIG) spheres, microwave cavities and a superconducting (SC) qubit. In the schemes, the YIGs are coupled to respective microwave cavities in resonant way, and the SC qubit is placed at the center of the cavities, which interacts with the cavities simultaneously. By exchanging the virtual photon, the cavities can indirectly interact in the far-detuning regime. Detailed protocols are presented to establish entanglement for two, three and arbitrary N magnons with reasonable fidelities.

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