Entanglement enhanced and one-way steering in PT -symmetric cavity magnomechanics

• URL: http://arxiv.org/abs/2008.03870v1
• Date: Mon, 10 Aug 2020 02:46:17 GMT
• Title: Entanglement enhanced and one-way steering in PT -symmetric cavity magnomechanics
• Authors: Ming-Song Ding and Chong Li
• Abstract summary: We study creation of entanglement and quantum steering in a symmetric cavity magnomechanical system. One-way quantum steering between magnon-phonon and photon-phonon modes can be obtained in the unbroken-PT -symmetric regime. This work opens up a route to explore the characteristics of quantum entanglement and steering in magnomechanical systems.
• Score: 8.345632941376673
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study creation of entanglement and quantum steering in a parity-time- (PT -) symmetric cavity magnomechanical system. There is magnetic dipole interaction between the cavity and photon-magnon, and there is also magnetostrictive interaction which is induced by the phononmagnon coupling in this system. By introducing blue-detuned driving microwave field to the system, the bipartite entanglement of the system with PT -symmetry is significantly enhanced versus the case in the conventional cavity magnomechanical systems (loss-loss systems). Moreover, the one-way quantum steering between magnon-phonon and photon-phonon modes can be obtained in the unbroken-PT -symmetric regime. The boundary of stability is demonstrated and this show that the steady-state solutions are more stable in the gain and loss systems. 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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