Work

Preparing magnonic non-Gaussian states by adding a single magnon onto Gaussian states

Year: 2025

Type: article

Abstract: Quantum magnonics based on yttrium iron garnet (YIG) spheres provides a new arena for observing macroscopic quantum states. Here, we propose to prepare two kinds of non-Gaussian magnonic states by adding a single magnon to two Gaussian states, namely, coherent and thermal states. We adopt an optomagnonic system of a YIG sphere and use fast optical pulses to weakly activate the magnon-induced Stokes scattering. Conditioned on the detection of a polarized single photon, a single magnon can be added to an initial Gaussian state. We use a microwave cavity to prepare an initial magnon coherent state and finally read out the generated single-magnon added coherent or thermal state. Both the non-Gaussian states of a magnon mode in a large YIG sphere are macroscopic quantum states, which exhibit many nonclassical properties, such as sub-Poissonian statistics, quadrature squeezing, and a negative Wigner function. Further, both states show a smooth transition from a quantum state to a classical state with the change of the coherent or thermal magnon excitations and thus can be used for the fundamental study of the quantum-to-classical transition.

Source: Physical Review Research

DOI: 10.1103/jr6g-dcnp

Authors: Zi-Xu Lu, Huai-Bing Zhu, Xuan Zuo, Jie Li

Institution: Zhejiang University

Language: English

Topic: Mechanical and Optical Resonators

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China