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arXiv · 2112.02351

Dissipation-induced nonreciprocal magnon blockade in a magnon-based hybrid system

Yimin Wang·Wei Xiong·Zhiyong Xu·Guo-Qiang Zhang·J. Q. You
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Abstract

We propose an experimentally realizable nonreciprocal magnonic device at the single-magnon level by exploiting magnon blockade in a magnon-based hybrid system. The coherent qubit-magnon coupling, mediated by virtual photons in a microwave cavity, leads to the energy-level anharmonicity of the composite modes. In contrast, the corresponding dissipative counterpart, induced by traveling microwaves in a waveguide, yields inhomogeneous broadenings of the energy levels. As a result, the cooperative effects of these two kinds of interactions give rise to the emergence of the direction-dependent magnon blockade. We show that this can be demonstrated by studying the equal-time second-order correlation function of the magnon mode. Our study opens an avenue to engineer nonreciprocal magnonic devices in the quantum regime involving only a small number of magnons.

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Yimin Wang, Wei Xiong, Zhiyong Xu, Guo-Qiang Zhang, J. Q. You. 2021-12-04. Dissipation-induced nonreciprocal magnon blockade in a magnon-based hybrid system. https://doi.org/10.1007/s11433-021-1880-7

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