Generation of Bell and GHZ states from a hybrid qubit-photon-magnon system

Abstract

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

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Cited by in corpus (18)

• Magnon squeezing by two-tone driving of a qubit in cavity-magnon-qubit systems
• Detection sensitivity enhancement of magnon Kerr nonlinearity in cavity magnonics induced by coherent perfect absorption
• Generation of long-lived $W$ states via reservoir engineering in dissipatively coupled systems
• Switchable Superradiant Phase Transition with Kerr Magnons
• Optomechanical-interface-induced strong spin-magnon coupling
• Generating Bell states and $N$-partite $W$ states of long-distance qubits in superconducting waveguide QED
• Chiral coupling between a ferromagnetic magnon and a superconducting qubit
• Floquet generation of magnonic NOON state
• Stabilizing a single-magnon state by optimizing magnon blockade
• Nonreciprocal quantum phase transition in cavity magnonics
• Chiral current in Floquet cavity-magnonics
• Quantum entanglement generation on magnons assisted with microwave cavities coupled to a superconducting qubit
• Entangling distant systems via universal nonadiabatic passage
• Magnon cat states in a cavity-magnon-qubit system via two-magnon driving and dissipation
• Entangling cavity-magnon polaritons by interacting with phonons
• Magnon squeezing near a quantum critical point in a cavity-magnon-qubit system
• Cat-state-like non-Gaussian entanglement in magnon systems
• Remote magnon-phonon entanglement in the waveguide-magnomechanics