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

2023/08/29 by Hanamura, Fumiya, Asavanant, Warit, Kikura, Seigo +8 · 2 citations
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2308.15024

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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• Optimal Multiparameter Quantum Estimation of Magnonic Couplings in a Magnomechanical Cavity
• Quantum sensing of displacements with stabilized GKP states

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