近日，日本大阪大学的Akio Fujiwara及其研究团队取得一项新进展。经过不懈努力，他们实现两个光点源的自适应量子态估计。相关研究成果已于2024年3月26日在国际知名学术期刊《物理评论A》上发表。

在这项研究中，研究人员提出了一种使用自适应量子态估计方案，以最高精度同时估计两个点源位置的方法。

据悉，经典光学中存在着一个著名的分辨率极限，即瑞利诅咒，它限制了我们紧密分离两个非相干光源的能力。然而，近期Tsang等人揭示了量子理论框架内有可能突破这一难题。继他们的工作之后，尽管人们提出了多种估计方法来克服瑞利诅咒，但至今尚未有一种方法能在单光子测量的基础上，同时实现两个点源位置的高精度估计。

附：英文原文

Title: Adaptive quantum state estimation for two optical point sources

Author: Masataka Kimizu, Fuyuhiko Tanaka, Akio Fujiwara

Issue&Volume: 2024/03/26

Abstract: In classical optics, there is a well-known resolution limit called Rayleigh's curse in the separation of two incoherent optical sources in close proximity. Recently, Tsang et al. [Phys. Rev. X 6, 031033 (2016)] revealed that this difficulty may be circumvented in the framework of quantum theory. Following their work, various estimation methods have been proposed to overcome Rayleigh's curse, but none of them enables us to estimate the positions of two point sources simultaneously based on single-photon measurements with high accuracy. In this study, we propose a method to simultaneously estimate the positions of two point sources with the highest accuracy using an adaptive quantum state estimation scheme.

DOI: 10.1103/PhysRevA.109.032434

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.109.032434