Quantifying high-dimensional spatial entanglement with a single-photon-sensitive time-stamping camera

• URL: http://arxiv.org/abs/2302.03756v1
• Date: Tue, 7 Feb 2023 21:00:30 GMT
• Title: Quantifying high-dimensional spatial entanglement with a single-photon-sensitive time-stamping camera
• Authors: Baptiste Courme, Chlo\'e Verni\`ere, Peter Svihra, Sylvain Gigan, Andrei Nomerotski and Hugo Defienne
• Abstract summary: We quantify high-dimensional spatial entanglement using a single-photon sensitive time-stamping camera. We pave the way towards the development of practical quantum information processing protocols based on high-dimensional entanglement.
• Score: 0.7829352305480284
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: High-dimensional entanglement is a promising resource for quantum technologies. Being able to certify it for any quantum state is essential. However, to date, experimental entanglement certification methods are imperfect and leave some loopholes open. Using a single-photon sensitive time-stamping camera, we quantify high-dimensional spatial entanglement by collecting all output modes and without background subtraction, two critical steps on the route towards assumptions-free entanglement certification. We show position-momentum Einstein-Podolsky-Rosen (EPR) correlations and quantify the entanglement of formation of our source to be larger than 2.8 along both transverse spatial axes, indicating a dimension higher than 14. Our work overcomes important challenges in photonic entanglement quantification and paves the way towards the development of practical quantum information processing protocols based on high-dimensional entanglement.

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