Yang Yikai, Babkevich Peter, Gaal Richard, Živković Ivica, Rønnow Henrik M
Department of Engineering Science, University of Oxford, Parks Road, Oxford, OX1 3PJ, UK.
Laboratory of Quantum Magnetism, Institute of Physics, École polytechnique fédérale de Lausanne, 1015, Lausanne, Switzerland.
Sci Rep. 2024 Oct 24;14(1):25227. doi: 10.1038/s41598-024-75978-x.
We first present a formalism that incorporates the input-output formalism and the linear response theory to employ cavity-magnon-polariton coupling as a spectroscopic tool for investigating strongly hybridized electro-nuclear spin excitations. A microscopic relation between the generalized susceptibility and the scattering parameter in strongly hybridized cavity-magnon-polariton systems has been derived without resorting to semi-classical approximations. The formalism is then applied to both analyze and simulate a specific systems comprising a model quantum Ising magnet ( ) and a high-finesse 3D re-entrant cavity resonator. Quantitative information on the electro-nuclear spin states in is extracted, and the experimental observations across a broad parameter range were numerically reproduced, including an external magnetic field traversing a quantum critical point. The method potentially opens a new avenue not only for further studies on the quantum phase transition in but also for a wide range of complex magnetic systems.
我们首先提出一种形式体系，它结合了输入-输出形式体系和线性响应理论，将腔磁振子-极化激元耦合用作研究强杂化电-核自旋激发的光谱工具。在不借助半经典近似的情况下，已经推导了强杂化腔磁振子-极化激元系统中广义磁化率与散射参数之间的微观关系。然后将该形式体系应用于分析和模拟一个特定系统，该系统由一个模型量子伊辛磁体（ ）和一个高精细度三维重入腔谐振器组成。提取了 中电-核自旋态的定量信息，并对跨越广泛参数范围的实验观测进行了数值再现，包括外部磁场穿越量子临界点的情况。该方法不仅可能为 中量子相变的进一步研究，也为广泛的复杂磁系统开辟一条新途径。
