Entanglement-enhanced dual-comb spectroscopy
Entanglement-enhanced dual-comb spectroscopy
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DOI：
10.1038/s41534-023-00758-w
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发表时间：
2023-04
影响因子：
7.6
通讯作者：
Haowei Shi;Zaijun Chen;S. Fraser;Mengjie Yu;Zheshen Zhang;Quntao Zhuang
中科院分区：
文献类型：
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作者：
Haowei Shi;Zaijun Chen;S. Fraser;Mengjie Yu;Zheshen Zhang;Quntao Zhuang
双梳干涉测量利用两个激光频率梳的干涉，在光谱应用中提供前所未有的能力。在过去的十年中，最先进的系统已经达到了这样一个点，即每单位采集时间的信噪比从根本上受到来自真空波动的散粒噪声的限制。为了解决这个问题，我们提出了一个纠缠增强的双梳光谱协议，利用量子资源，显着提高信噪比性能。为了分析真实的系统的性能，我们建立了一个考虑实际噪声的双梳光谱量子模型。在此基础上，我们提出了在梳线周围引入边带纠缠的量子梳，以抑制外差探测中的散粒噪声。我们的研究结果表明，在uW到mW的功率范围内显着的量子优势，使这种技术特别有吸引力的生物和化学传感应用。此外，量子梳可以使用非线性光学进行工程设计，并有望在近期进行实验。
Dual-comb interferometry harnesses the interference of two laser frequency combs to provide unprecedented capability in spectroscopy applications. In the past decade, the state-of-the-art systems have reached a point where the signal-to-noise ratio per unit acquisition time is fundamentally limited by shot noise from vacuum fluctuations. To address the issue, we propose an entanglement-enhanced dual-comb spectroscopy protocol that leverages quantum resources to significantly improve the signal-to-noise ratio performance. To analyze the performance of real systems, we develop a quantum model of dual-comb spectroscopy that takes practical noises into consideration. Based on this model, we propose quantum combs with side-band entanglement around each comb lines to suppress the shot noise in heterodyne detection. Our results show significant quantum advantages in the uW to mW power range, making this technique particularly attractive for biological and chemical sensing applications. Furthermore, the quantum comb can be engineered using nonlinear optics and promises near-term experimentation.