报告题目：Towards quantum-enhanced sensing and imaging

报告人： 南京大学 张利剑 教授

时间：2025年5月29日 14：00

地点：知新楼C709

主持人：逯鹤 教授

摘要：Locating an emitter and resolving different emitters, i.e. estimating their relative positions, are key tasks in imaging problems and determine the ultimate resolution. It was widely accepted that Rayleigh’s criterion sets the limit of the resolving power of an imaging system. Recently there have been efforts to formulate imaging as a parameter estimation problem and analyze its performance using the tools developed in quantum metrology. This formulation allows to identify the fundamental limit of resolution and methods to overcome Rayleigh’s criterion [1]. In this talk I will present our recent works along this direction. With the applications of multiple-parameter quantum metrology, we derive the fundamental quantum limit of locating a single emitter and resolving two emitters with different brightness in three-dimensional space [2-4]. The effects of the point spread functions and coherence of the source on location precision and resolution are also analyzed. I will also talk about the experimental demonstrations of the imaging schemes to achieve the quantum limit. Our results may find wide applications from microscopy to astrometry.

References

[1] M. Tsang, R. Nair, and X.-M. Lu, Phys. Rev. X 6, 031033 (2016).

[2] Ben Wang, Liang Xu et al., Photon. Res. 9, 1522 (2021).

[3] Ben Wang, Liang Xu et al., Chin. Opt. Lett. 21, 042601 (2023).

[4] Chenyu Hu, Liang Xu et al., Quant. Frontiers 2, 20 (2023).