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arXiv · 2402.16042

Enhancement of Entanglement via Josephson Parametric Amplifier in a Dual Cavity-Magnon System

Abdelkader Hidki·Abderrahim Lakhfif·Mostafa Nassik·Rizwan Ahmed·Amjad Sohail
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Abstract

In the two microwave (MW) cross-shaped cavity magnon system, we describe a method to produce multipartite entanglement and quantum steering. To achieve squeezed states of the magnons, a Josephson parametric amplifier (JPA) creates a squeezed vacuum field that drives the two cavities. We theoretically demonstrate that the cavity-cavity entanglement can be generated at the resonance point, however, increasing the cavity and magnon decay rates generate the cavity-magnon entanglement. By changing the squeezing parameter and increasing the decay rates, we can transfer the cavity-cavity entanglement to cavity-magnon entanglement. Furthermore, the cavity-cavity entanglement (survive up to 2.8K) not only found to be much stronger but also more robust as compared to cavity-magnon entanglement (survive up to 0.4K). More importantly, the genuine photon-magnon-photon tripartite entanglement could be achieved, which is robust against the thermal fluctuations and depends strongly on squeezing parameter. Furthermore, for current dual cavity-magnon system, two-way quantum steering is found when the optomagnonical couplings are equal. The current study offers a straightforward and practical method for achieving multipartite quantum correlations.

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Abdelkader Hidki, Abderrahim Lakhfif, Mostafa Nassik, Rizwan Ahmed, Amjad Sohail. 2024-02-25. Enhancement of Entanglement via Josephson Parametric Amplifier in a Dual Cavity-Magnon System. https://arxiv.org/abs/2402.16042

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