期刊
OPTICS COMMUNICATIONS
卷 490, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.optcom.2021.126903
关键词
Entanglement; Cavity magnomechanics; Quantum steering; PT-symmetry
类别
资金
- National Natural Science Foundation of China (NSFC) [11574041, 11475036]
This study shows that bipartite entanglement and magnon-phonon steering in a PT-symmetry system are significantly enhanced compared to a conventional cavity magnomechanical system. Additionally, one-way-like magnon-phonon quantum steering can be achieved in the unbroken-PT-symmetry regime. The gain-loss system is demonstrated to be more stable than the conventional loss-loss system under certain parameters, providing potential applications in quantum state engineering and quantum information.
We study creation of entanglement and quantum steering in a parity -time-(PT-) symmetric cavity magnomechanical system. There are photon-magnon coupling and phonon-magnon coupling in this system. By introducing a gain cavity mode, a PT-symmetric Hamiltonian of the system is obtained. We find that bipartite entanglement and magnon-*phonon steering in PT-symmetry system (gain-loss system) are significantly enhanced versus the case in the conventional cavity magnomechanical system (loss-loss system). Moreover, the magnon-*phonon one-way-like quantum steering can be realized in unbroken-PT-symmetry regime. The boundary of stability is demonstrated and it shows that the gain-loss system becomes more stable with respect to the conventional loss-loss system under the parameters we consider. This work opens up a route to explore the characteristics of quantum entanglement and steering in magnomechanical systems, which might have potential applications in quantum state engineering and quantum information.
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