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arXiv · 2512.10338

Optomagnonic generation of entangled travelling fields with different polarizations

Zi-Xu Lu·Huai-Bing Zhu·Xuan Zuo·Jie Li
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Abstract

The optomagnonic coupling between magnons and optical photons is an essential component for building remote quantum networks based on magnonics. Here we show that such a coupling, manifested as the magnon-induced Brillouin light scattering, can be exploited to entangle two propagating optical fields. The protocol employs two pairs of the whispering gallery modes coupled to the same magnon mode in a YIG sphere. In each pair a strong pump field is applied to activate either Stokes or anti-Stokes scattering. Due to the magnon mode involving in the two scattering processes and as a mediation, Stokes and anti-Stokes photons of different polarizations get entangled. The entanglement can be extracted by filtering the travelling output fields centered at the Stokes and anti-Stokes sidebands. Optimal conditions are identified under which strong output entanglement can be achieved.

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Zi-Xu Lu, Huai-Bing Zhu, Xuan Zuo, Jie Li. 2025-12-11. Optomagnonic generation of entangled travelling fields with different polarizations. https://arxiv.org/abs/2512.10338

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