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arXiv · 2308.15024

Single-shot single-mode optical two-parameter displacement estimation beyond classical limit

Fumiya Hanamura·Warit Asavanant·Seigo Kikura·Moeto Mishima·Shigehito Miki·Hirotaka Terai·Masahiro Yabuno·Fumihiro China·Kosuke Fukui·Mamoru Endo·Akira Furusawa
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Abstract

Uncertainty principle prohibits the precise measurement of both components of displacement parameters in phase space. We have theoretically shown that this limit can be beaten using single-photon states, in a single-shot and single-mode setting [F. Hanamura et al., Phys. Rev. A 104, 062601 (2021)]. In this paper, we validate this by experimentally beating the classical limit. In optics, this is the first experiment to estimate both parameters of displacement using non-Gaussian states. This result is related to many important applications, such as quantum error correction.

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Fumiya Hanamura, Warit Asavanant, Seigo Kikura, Moeto Mishima, Shigehito Miki, Hirotaka Terai, Masahiro Yabuno, Fumihiro China, Kosuke Fukui, Mamoru Endo, Akira Furusawa. 2023-08-29. Single-shot single-mode optical two-parameter displacement estimation beyond classical limit. https://doi.org/10.1103/physrevlett.131.230801

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