https://doi.org/10.1140/epjp/s13360-024-05473-9
Regular Article
Optomagnonics entanglement and magnon blockade in a fiber-coupled hybrid optomagnonic-superconductor system
1
Laser and Optics Group, Faculty of Physics, Yazd University, Yazd, Iran
2
Physics Department, Education Faculty, Nimruz University, Zaranj, Afghanistan
Received:
8
February
2024
Accepted:
19
July
2024
Published online:
6
August
2024
The generation of nonclassical states between spatially separated systems facilitates the establishment of quantum networks and fundamental tests of quantum theory. Here, we show that how to manipulate the nonclassical features of an optomagnonic configuration, i.e., a hybrid magnon-superconducting qubit (SQ) system. In practice, the system constitutes two cavities coupled via an optical fiber such that one cavity contains a ferromagnetic sphere, and the other one encompasses a SQ. Let us consider a particular case, wherein there is no direct interaction between the ferromagnetic sphere and SQ, but they can be coupled through their respective quantized cavity fields. In practical applications, a monochromatic field is applied to drive the SQ, and a weak probe field may be applied to the ferromagnetic sphere to observe the magnon blockade. To make our results close to real circumstances, we take into account different sources of dissipation. We investigate the generation of entanglement between the cavity fields as well as the magnonic mode and SQ. We also study the magnon quantum statistics to find out that under what conditions the system may be used as a source of single-magnon. Our numerical results demonstrate that the steady-state entanglement between photons can be improved by increasing the strength of the driving field and the coupling strength between the two cavities, i.e., the communication channel, especially in the large-detuning regime. Besides, the nonclassical magnons can be realized in various interaction regimes, e.g., weak, moderate as well as strong magnon-cavity coupling. However, the magnon blockade effect is more plausible in the moderate coupling of magnon-cavity interaction. The proposed model may open up a new route to develop a building block for quantum magnonic networks with remote quantum nodes connected by light.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
