发表机构
Kyung Hee University; Sungkyunkwan University（庆熙大学; 成均馆大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究发展了由双磁振子拉曼圆二色性探测的高阶磁振子量子几何的规范不变理论，将其应用于场极化Kitaev磁体，确立RCD为广义磁振子量子几何的光谱探针。
AI 中文摘要
我们发展了一种由双磁振子拉曼圆二色性（RCD）探测的高阶磁振子量子几何的规范不变理论。拉曼算符可分解为贝里联络、协变导数以及贝里联络的乘积，从而产生超出量子度量和贝里曲率的量子几何张量。将该理论应用于场极化的Kitaev磁体，我们发现高阶几何张量主导了二色性响应。我们的结果确立了RCD作为广义磁振子量子几何的光谱探针的地位。
英文摘要
We develop a gauge-invariant framework that relates two-magnon Raman circular dichroism (RCD) to higher-order magnon quantum geometry. In the magnon band basis, the Raman operator decomposes into interband Berry connections, their covariant derivatives, and products of successive connections, generating higher-order, multi-state geometric tensors beyond the conventional single-band quantum metric and Berry curvature. Applying this framework to a field-polarized Kitaev magnet, we show that higher-order geometric tensors govern the dichroic response. Our results establish RCD as a spectroscopic probe of generalized magnon quantum geometry.
Comments10+6 pages, 6 figures, 1 table
