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Acta Physica Sinica

Strong-field-induced quantum coherent emission and its applications

ZHAO Jing, LIU Yi, WU Cheng-Yin, Yao Jin-ping, Zhao Zeng-Xiu

Published Sep 4, 2026• 0 citations

Abstract

近年来，强场物理与量子光学两个领域交叉产生的物理效应正逐步成为研究热点。融合超快宽谱激发与共振调控，可在亚周期内制备电子-电子、电子-离子多体纠缠与相干，进而产生强场相干性诱导的空气激光、超连续辐射与自由感应衰变等新型相干辐射。本文围绕强场量子光学这一新兴交叉领域，聚焦强场下量子相干辐射及应用，综述其理论基础、物理机制及潜在应用等方面的现状和挑战。期望以此推动开放系统多体强场量子光学的理论与实验研究，以及对多自由度强场量子相干性建立、演化与弛豫规律的探索，拓展强场量子相干辐射与放大机制，为构建时-频-空稳定可控的新型辐射源、发展远程探测新技术、实现空气激光在痕量分子检测与燃烧诊断等方面的应用提供参考。

DOI: 10.7498/aps.76.20260941

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近年来，强场物理与量子光学两个领域交叉产生的物理效应正逐步成为研究热点。融合超快宽谱激发与共振调控，可在亚周期内制备电子-电子、电子-离子多体纠缠与相干，进而产生强场相干性诱导的空气激光、超连续辐射与自由感应衰变等新型相干辐射。本文围绕强场量子光学这一新兴交叉领域，聚焦强场下量子相干辐射及应用，综述其理论基础、物理机制及潜在应用等方面的现状和挑战。期望以此推动开放系统多体强场量子光学的理论与实验研究，以及对多自由度强场量子相干性建立、演化与弛豫规律的探索，拓展强场量子相干辐射与放大机制，为构建时-频-空稳定可控的新型辐射源、发展远程探测新技术、实现空气激光在痕量分子检测与燃烧诊断等方面的应用提供参考。

The idea of a mazer is put forward with particular reference to the question of the driving-induced atomic coherence, which is established by a coherent driving field. The interaction of a quantum cavity field and an ultracold V-type three-level atom in which two levels are coupled by a coherent driving field, is derived. Its general quantum theory is established and the atomic emission probability and photon statistics are calculated and analysed. It is found that the mazer based on this driving-induced atomic coherence shows new features. There is a non-vanishing probability for the atom emitting a photon in the cavity even when the resonance condition is not fulfilled (here the resonance condition means that the cavity length is an integer multiple of half the atomic de Broglie wavelength). Under the resonance condition, the atomic emission probability has two sets of resonance peaks. For a very strong coherent driving field, the emission of the atom can be forbidden. As to the photon statistics, when the driving field is not very strong, the driving-induced atomic coherence reduces the photon number fluctuations of the cavity field. The photon statistics exhibits strong sub-Poissonian behaviour. In the region considered here, it can even be sub-Poissonian for any cavity length. However, when the driving field is too strong, the sub-Poissonian property may disappear.

光谱测量与成像技术的进步，已成为生命科学与材料科学研究中的关键表征手段。然而，在针对光学响应微弱的样品（如低维材料、活体细胞等）进行实际观测时，高功率激发光往往引入显著经典噪声，并造成不可忽视的光致损伤，从而限制了光学测量的信噪比与应用范围。在此背景下，具备特殊量子统计特性的非经典光源（如纠缠光与压缩光）为实现超越经典极限的信噪比提升提供了极具潜力的解决方案。本文聚焦于量子增强光谱与成像领域，系统梳理了基于纠缠光与压缩光两类重要量子光源的最新研究进展。纠缠光凭借光子间的量子关联特性，在关联成像、非探测光子成像及超快干涉测量等应用中展现出卓越的抗噪声能力；而压缩光则通过压缩光场噪声，在位移传感、等离激元探测及非线性显微成像等方面显著提升了探测灵敏度与信噪比。本文进一步系统阐述了量子光源在提高信噪比、降低光致损伤、提升时间分辨率以及增强非线性转换效率等方面的独特优势，并分析了当前制约量子成像技术实用化的关键挑战，包括光源亮度低，系统损耗大等问题。最后，对该领域未来的发展方向进行了展望。

We propose an efficient scheme to manipulate spontaneous emission spectra using optical vortices carrying orbital angular momentum (OAM) in a coherently driven cold five-level atomic system assisted by a radio frequency (RF) or microwave field. Using experimentally achievable parameters, we find that the spontaneous emission is strongly influenced by quantum destructive interference. And we show that the structured light profile of the probe field can be transferred to the spontaneous emission spectrum via spontaneously generated coherence (SGC). With the aid of SGC, the intensities and detunings of the control and RF fields can be used to tailor the vortex-induced spontaneous emission spectra. When the control and RF fields are configured as vortex beams, it is demonstrated that the spontaneous emission can be coherently controlled through quantum interference by adjusting their topological charges (TCs). Furthermore, we explore intriguing optical properties of the vortex-induced spontaneous emission by varying the TCs of the probe and control fields. This coherently driven atomic system features three closely spaced levels, giving rise to multiple vortex-induced SGC pathways. Our scheme opens avenues for applications in structured light, ranging from optical storage to optical communication.