.png){kind=icon}
返回
Entanglement-inspired frequency-agile rangefinding
.png){kind=icon}
OA
AI
DOI：10.1038/s41467-026-68589-9.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Entanglement, a key feature of quantum mechanics, is recognized for its non-classical correlations which have been shown to provide significant noise resistance in single-photon rangefinding and communications. Drawing inspiration from the advantage given by energy-time entanglement, we developed an energy-time correlated source based on a classical laser that preserves the substantial noise reduction typical of quantum illumination while surpassing the quantum brightness limitation by over six orders of magnitude, making it highly suitable for practical remote sensing applications. A frequency-agile pseudo-random source is realized through fiber chromatic dispersion and pulse carving using an electro-optic intensity modulator. Operating at a faint transmission power of 48 μW, the distance between two buildings 154.8182 m apart can be measured with a precision better than 0.1 mm, under varying solar background levels and weather conditions with an integration time of only 100 ms. These trials verified the predicted noise reduction of this system, demonstrating advantages over quantum illumination-based rangefinding and highlighting its potential for practical remote sensing applications. Quantum range finding struggles in bright background and at long distance. Here, the authors demonstrate a quantum-inspired, energy-time correlated classical rangefinder. It preserves quantum noise suppression, works at low power, and enables robust daylight remote ranging in real-world environments
Keyword:
energy-time entanglement
quantum illumination
rangefinding
classical laser source
noise suppression
期刊
IF:
15.7
论文数:
9.3W
被引数:
91.2W
机构
引用论文
An integrated space-to-ground quantum communication network over 4,600 kilometres一个超过4,600公里的综合天地量子通信网络.png)
Nature
NatureIF0
PREAI
分享收藏分享收藏
查看更多内容