Chiral coupling at the single-quantum level promises to be a remarkable potential for quantum information processing. Here we propose to achieve a chiral interaction between a magnon mode in a ferromagnetic sphere and a superconducting qubit mediated by a one-dimensional coupled-cavity array. When the qubit is coupled to two lattice sites of the array and each one is encoded with a tunable phase, we can acquire a directional qubit-magnon interaction via the quantum interference effect. This work opens up an alternative route to construct chiral devices, which are expected to become a building block in quantum magnonic networks.

• Received 17 May 2022
• Accepted 9 November 2022

DOI:https://doi.org/10.1103/PhysRevA.106.053714