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- W2938884993 abstract "Magnon-photon coupling has been experimentally realized inside a cavity and the emerging field known as cavity spintronics has attracted significant attention for its potential docking with quantum information science. However, one seldom knows whether this coupling implies an entanglement state among magnons and photons or not, which is crucial for its usage in quantum information. Here we study the entanglement properties among magnons and photons in an antiferromagnet-light system and find that the entanglement between magnon and photon is nearly zero while the magnon-magnon entanglement is very strong and it can be even further enhanced through the coupling with the cavity photons. The maximum enhancement occurs when the antiferromagnet reaches resonant with the light. The essential physics can be well understood within the picture of cavity induced cooling of magnon-magnon state near its joint vacuum with stronger entanglement. Our results are significant to extend the cavity spintronics to quantum manipulation and further provide an alternate to manipulate the deep strong correlations of continuous variable entanglement with a generic stable condition and easy tunability." @default.
- W2938884993 created "2019-04-25" @default.
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- W2938884993 date "2020-01-14" @default.
- W2938884993 modified "2023-10-16" @default.
- W2938884993 title "Enhancement of magnon-magnon entanglement inside a cavity" @default.
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- W2938884993 doi "https://doi.org/10.1103/physrevb.101.014419" @default.
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