Open AccessEntanglement enhanced by Kerr nonlinearity in a cavity-optomagnonics system
Author(s) -
Zhi-Bo Yang,
Jinsong Liu,
Hua Jin,
Qing-Hao Zhu,
AiDong Zhu,
Hongyu Liu,
Mingsheng Ying,
RongCan Yang
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.404522
Subject(s) - quantum entanglement , physics , kerr effect , quantum decoherence , nonlinear system , spins , quantum mechanics , optics , condensed matter physics , quantum
We present a method to enhance steady-state bipartite and tripartite entanglement in a cavity-optomagnonics system by utilizing the Kerr nonlinearity originating from the magnetocrystalline anisotropy. The system comprises two microwave cavities and a magnon and represents the collective motion of several spins in a macroscopic ferrimagnet. We prove that Kerr nonlinearity is reliable for the enhancement of entanglement and produces a small frequency shift in the optimal detuning. Our system is more robust against the environment-induced decoherence than traditional optomechanical systems. Finally, we briefly analyze the validity of the system and demonstrate its feasibility for detecting the generated entanglement.