美国康奈尔大学Nicholas Rivera团队研究了强光的噪声免疫量子相关。这一研究成果于2025年5月14日发表在《自然—光子学》杂志上。

具有高强度的激光器通常表现出远高于脉冲噪声水平的强强度波动。控制这种噪声对于广泛的应用至关重要，无论是经典的还是量子的。研究组演示了即使从具有大量过量噪声的输入开始，也能产生具有量子级噪声的强光。特别是，他们演示了强度接近0.1 TW cm^-2的强压缩光，但与高功率放大激光源相关的噪声输入会产生等于或低于散粒噪声水平的噪声（总体噪声降低30倍）。 

基于多模系统中量子噪声的新理论，研究组证明了从噪声输入产生量子光的能力源于多模量子相关，它最大限度地将输出光与输入光中的主要噪声通道解耦。作为一个例子，研究组证明了非线性光纤中的飞秒脉冲的这种效应，但使其结果具有噪声免疫相关性的光学及其他许多非线性系统是通用的。

附：英文原文

Title: Noise-immune quantum correlations of intense light

Author: Zia Uddin, Shiekh, Rivera, Nicholas, Seyler, Devin, Sloan, Jamison, Salamin, Yannick, Roques-Carmes, Charles, Xu, Shutao, Sander, Michelle Y., Kaminer, Ido, Soljai, Marin

Issue&Volume: 2025-05-14

Abstract: Lasers with high intensity generally exhibit strong intensity fluctuations far above the shot-noise level. Taming this noise is pivotal to a wide range of applications, both classical and quantum. Here we demonstrate the creation of intense light with quantum levels of noise even when starting from inputs with large amounts of excess noise. In particular, we demonstrate how intense squeezed light with intensities approaching 0.1TWcm2, but noise at or below the shot-noise level, can be produced from noisy inputs associated with high-power amplified laser sources (an overall noise reduction of 30-fold). On the basis of a new theory of quantum noise in multimode systems, we show that the ability to generate quantum light from noisy inputs results from multimode quantum correlations, which maximally decouple the output light from the dominant noise channels in the input light. As an example, we demonstrate this effect for femtosecond pulses in nonlinear fibres, but the noise-immune correlations that enable our results are generic to many other nonlinear systems in optics and beyond.

DOI: 10.1038/s41566-025-01677-2

Source: https://www.nature.com/articles/s41566-025-01677-2