阿秒关联干涉测量
Attosecond correlation interferometry
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中文总结 AI 辅助
本文通过双模压缩真空扰动高次谐波产生，将红外关联转移到阿秒XUV模式，并利用偶数次谐波干涉和协方差测量实现振幅与相位关联的阿秒级探测，建立量子阿秒科学框架。
中文摘要 AI 辅助
光学模式之间的关联，从经典涨落到量子纠缠，是现代光学和新兴量子技术的基石。然而，在电子运动的自然时间尺度——阿秒领域——探测这些关联仍然是一个重大挑战。在此，我们通过用双模明亮压缩真空扰动气相高次谐波产生，生成并表征了关联的阿秒极紫外（XUV）发射。信号场和闲频场将其关联的振幅和相位涨落印记到两组谐波上，从而将这些关联从红外转移到宽带XUV模式。偶数次谐波通过不可区分的XUV路径之间的干涉，作为这些关联的内在阿秒相位敏感探针。基于单发次分辨的协方差测量揭示了振幅关联，而偶数次谐波则以亚周期精度解析了相位关联。关联发射的时域重建显示，在仅30阿秒内，从最大涨落过渡到接近静默。尽管由信号和闲频驱动的阿秒脉冲序列各自表现出多余的涨落，但它们的联合重建显示出强烈抑制的涨落，反映了它们共享的关联。这些结果建立了一个在阿秒时间尺度上生成和探测量子关联的框架，为量子阿秒科学打开了大门。
英文摘要
Correlations between optical modes, ranging from classical fluctuations to quantum entanglement, are a cornerstone of modern optics and emerging quantum technologies. However, probing these correlations on the natural timescale of electronic motion - the attosecond regime - remains a major challenge. Here, we generate and characterize correlated attosecond extreme-ultraviolet (XUV) emission by perturbing gas-phase high-harmonic generation with two-mode bright squeezed vacuum. The signal and idler fields imprint their correlated amplitude and phase fluctuations onto two families of harmonics, thereby transferring these correlations from the infrared to broadband XUV modes. Even harmonics serve as an intrinsic attosecond phase-sensitive probe of these correlations through interference between indistinguishable XUV pathways. Shot-resolved covariance measurements reveal the amplitude correlations, while even-harmonics resolve the phase correlations with sub-cycle precision. Time-domain reconstruction of the correlated emission reveals a transition from maximal fluctuations to near-silence within only 30 as. Whereas the signal and idler driven attosecond pulse trains exhibit excess fluctuations individually, their joint reconstruction shows strongly suppressed fluctuations, reflecting their shared correlations. These results establish a framework for generating and probing quantum correlations on attosecond timescales, opening the door to quantum attosecond science.
发表机构
- Weizmann Institute of Science（魏茨曼科学研究所）
- Technion - Israel Institute of Technology（以色列理工学院）
- Max Planck Institute for the Structure and Dynamics of Matter（马克斯·普朗克物质结构与动力学研究所）
- Guangdong Technion-Israel Institute of Technology（广东以色列理工学院）
机构由 AI 辅助整理，请以论文原文为准。
