Quantum Non-Gaussian Photon Coincidences

2020/09/30 by Lukáš Lachman, Radim Filip
Computer Science · Mathematics · Physics and Astronomy · #Gaussian #Mathematics #Open quantum system #Parametric statistics #Photon #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum imaging #Quantum mechanics #Quantum network #Quantum sensor #Quantum state #Quantum technology #Statistical physics #Statistics #physics.optics #quant-ph

paper · pdf · doi:10.1103/physrevlett.126.213604

published as Phys. Rev. Lett. 126, 213604 (2021) · 14 pages, 5 figures

arxiv created 2021/03/01 · openalex publication_date 2021/05/27 · arxiv updated 2021/06/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Photon coincidences represent an important resource for quantum technologies. They expose nonlinear quantum processes in matter and are essential for sources of entanglement. We derive broadly applicable criteria for quantum non-Gaussian two-photon coincidences that certify a new quality of photon sources. The criteria reject states emerging from Gaussian parametric processes, which often limit applications in quantum technologies. We also analyze the robustness of the quantum non-Gaussian coincidences and compare it to the heralded quantum non-Gaussianity of single photons based on them.

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