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

• URL: http://arxiv.org/abs/2112.02351v1
• Date: Sat, 4 Dec 2021 14:49:09 GMT
• Title: Dissipation-induced nonreciprocal magnon blockade in a magnon-based hybrid system
• Authors: Yimin Wang, Wei Xiong, Zhiyong Xu, Guo-Qiang Zhang, J. Q. You
• Abstract summary: We propose an experimentally realizable nonreciprocal magnonic device at the single-magnon level. Coherent qubit-magnon coupling, mediated by virtual photons in a microwave cavity, leads to the energy-level anharmonicity of the composite modes. Dissipative counterpart, induced by traveling microwaves in a waveguide, yields inhomogeneous broadenings of the energy levels.
• Score: 6.059733930380898
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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