DLCZ拉曼光子源中的时间分辨关联工程
Time-resolved correlation engineering in DLCZ Raman photon sources
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中文总结 AI 辅助
本文提出了一种结合海森堡-朗之万动力学与麦克斯韦-薛定谔传播的开放系统量子理论，通过实验验证其预测，实现了DLCZ光子源关联特性的时间分辨调控，为存储兼容的量子网络光子源提供了定量框架。
中文摘要 AI 辅助
存储辅助量子网络需要具有可控时间特性和关联特性的光子源。Duan-Lukin-Cirac-Zoller（DLCZ）协议提供了基于原子系综中自发拉曼散射的平台，但仍缺乏统一的预测理论，将控制参数与实际传播和噪声条件下的关联特性联系起来。本文提出了一种包含传播效应的开放系统量子理论，该理论保留了写入诱导的粒子数重新分布，同时结合了海森堡-朗之万动力学与麦克斯韦-薛定谔传播。我们通过实验验证了该理论的关键预测。该理论预测了与时间相关的斯托克斯光产生、自旋波演化、 retrieved反斯托克斯波包以及时间分辨交叉关联。实验证实了在检索调谐下的稳健关联，以及更短写入脉冲下的增强关联，这与符合关联和偶然背景随平均自旋波激发数的不同标度一致。经典控制的检索实现了反斯托克斯波包的时间门控和切片，为与存储兼容的DLCZ光子源中的关联工程建立了定量框架。
英文摘要
Memory-assisted quantum networks require photon sources with controllable temporal and correlation properties. The Duan-Lukin-Cirac-Zoller (DLCZ) protocol provides a platform based on spontaneous Raman scattering in atomic ensembles, but a unified predictive theory connecting control parameters to correlations under realistic propagation and noise conditions remains lacking. Here we present a propagation-inclusive open-system quantum theory that retains write-induced population redistribution while combining Heisenberg-Langevin dynamics with Maxwell-Schrödinger propagation. We experimentally validate its key predictions. The theory predicts time-dependent Stokes generation, spin-wave evolution, retrieved anti-Stokes wavepackets, and time-resolved cross-correlations. Experiments confirm robust correlations under retrieval tuning and enhanced correlations for shorter write pulses, consistent with the different scaling of correlated coincidences and accidental backgrounds with the mean spin-wave excitation number. Classically controlled retrieval enables temporal gating and slicing of the anti-Stokes wavepacket, establishing a quantitative framework for correlation engineering in memory-compatible DLCZ photon sources.
