Generation of Bell and Greenberger-Horne-Zeilinger states from a hybrid qubit-photon-magnon system

We propose a level-resolved protocol in hybrid architecture for connecting superconducting qubit and magnon mode contained within microwave cavity (resonator) to generate the local global entangled states, enabling wide range of applications quantum communication, metrology, information processing. Exploiting high-degree controllability such qubit-photon-magnon system, we derive effective Hamiltonians at second- or third-order resonant points by virtue strong counter-rotating interactions between resonator magnon. Consequently, can efficiently Bell states photon-magnon qubit-magnon subsystems Greenberger-Horne-Zeilinger state whole system. also check robustness our against environmental noise Lindblad master equation. Our work makes this platform high-fidelity candidate realization maximally-entangled multiple states.