以更高音调寻找轴子：高强度激光束对撞产生的三次谐波
Searching for Axions on a Higher Note: Third-Harmonic Generation from Colliding High-Intensity Laser Beams
- University of L’Aquila（拉奎拉大学）
- CNR-SPIN（意大利国家研究委员会自旋物理中心）
- INFN Sezione di Padova（帕多瓦国家核物理研究所）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究提出利用两束约$10^{24}\\,\mathrm{W/cm^2}$的非共线偏振高强度激光对撞产生的三次谐波，实现类轴子粒子的生成与探测，可共振增强转换率，有望探测未被探索的轴子参数空间区域。
AI中文摘要：
我们提出了一种新的实验室策略，通过两束非共线、偏振的高强度激光束诱导的三次谐波产生来生成和探测类轴子粒子，这两束激光的峰值强度约为$10^{24}\\,\mathrm{W/cm^2}$，其中三次谐波信号由轴子场产生。从轴子修正的麦克斯韦方程出发，我们解析推导了轴子诱导的三次谐波场，并表明利用最先进的拍瓦激光装置，可在广泛的轴子质量和耦合范围内获得可探测信号。该装置的一个关键特征是，通过调节两束激光之间的角度，可使轴子-光子转换率共振增强，且该机制不依赖于装置的物理体积。因此，所提出的配置可探测轴子参数空间中未被探索的区域，并为下一代基于高功率激光的轴子探测铺平道路。
英文摘要：
We propose a new laboratory strategy to generate and detect axion-like particles via third-harmonic generation induced by two non-collinear, polarised high-intensity laser beams of peak intensity of the order of $10^{24}\,\mathrm{W/cm^2}$, where the third-harmonic signal is generated by the axion field. Starting from the axion-modified Maxwell equations, we analytically derive the axion-induced third-harmonic field, and show that by using state-of-the-art petawatt laser facilities, a detectable signal can be obtained over a broad range of axion masses and couplings. A key feature of the setup is that the axion-photon conversion rate can be resonantly enhanced by tuning the angle between the two beams through a mechanism that does not depend on the physical volume of the apparatus. The proposed configuration may therefore probe an unexplored region of axion parameter space and pave the way for next-generation high-power laser-based axion searches.
