Experimental quantum non-Gaussian coincidences of entangled photons

Quantum non-Gaussianity, a more potent and highly useful form of nonclassicality, excludes all convex mixtures of Gaussian states and Gaussian parametric processes generating them. Here, for the first time, we conclusively test quantum non-Gaussian coincidences of entangled photon pairs with the CHS...

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Bibliographic Details
Published in:arXiv.org 2024-01
Main Authors: Liu, Run-Ze, Yu-Kun, Qiao, Lachman, Lukáš, Zhen-Xuan Ge, Chung, Tung-Hsun, Jun-Yi, Zhao, Li, Hao, You, Lixing, Filip, Radim, Yong-Heng Huo
Format: Article
Language:English
Subjects:
Gaussian process
Optical properties
Photons
Quantum dots
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Summary:Quantum non-Gaussianity, a more potent and highly useful form of nonclassicality, excludes all convex mixtures of Gaussian states and Gaussian parametric processes generating them. Here, for the first time, we conclusively test quantum non-Gaussian coincidences of entangled photon pairs with the CHSH-Bell factor \(S=2.328\pm0.004\) from a single quantum dot with a depth up to \(0.94\pm 0.02\) dB. Such deterministically generated photon pairs fundamentally overcome parametric processes by reducing crucial multiphoton errors. For the quantum non-Gaussian depth of the unheralded (heralded) single-photon state, we achieve the value of \(8.08\pm0.05\) dB (\(19.06\pm0.29\) dB). Our work experimentally certifies the exclusive quantum non-Gaussianity properties highly relevant for optical sensing, communication and computation.
ISSN:2331-8422