Quantum networks assisted by dark modes in optomagnonic systems
Chengsong Zhao, Zhen Yang, Da‐Wei Wang, Ye‐Ting Yan, Chong Li, Zhihai Wang, Ling Zhou
Abstract
In this paper, we present a scheme to construct a quantum network based on optomagnonic systems where the photon-magnon coupling systems are connected by a waveguide. We derive the effective master equation of magnon modes by eliminating the waveguide modes and optical modes. By diagonalizing the dissipative part of the master equation, we identify dark modes so as to eliminate the effect of the dissipation induced by the waveguide. Employing dark modes, we investigate the quantum state transfer and entangled state generation in the two-node cascaded or chiral quantum network. We extend the method to an $N$-node quantum network and show the generation of a W state. We also consider the influence of experimental imperfections. Our scheme is meaningful for building a quantum network based on a magnonic system.