Experimental certification of contextuality, coherence and dimension in a programmable universal photonic processor

• URL: http://arxiv.org/abs/2311.03266v1
• Date: Mon, 6 Nov 2023 16:59:00 GMT
• Title: Experimental certification of contextuality, coherence and dimension in a programmable universal photonic processor
• Authors: Taira Giordani, Rafael Wagner, Chiara Esposito, Anita Camillini, Francesco Hoch, Gonzalo Carvacho, Ciro Pentangelo, Francesco Ceccarelli, Simone Piacentini, Andrea Crespi, Nicol\`o Spagnolo, Roberto Osellame, Ernesto F. Galv\~ao and Fabio Sciarrino
• Abstract summary: We experimentally certify coherence witnesses tailored for quantum systems of increasing dimension. In particular, we show the effectiveness of the proposed coherence and dimension witnesses for qudits of dimensions up to 5.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum superposition of high-dimensional states enables both computational speed-up and security in cryptographic protocols. However, the exponential complexity of tomographic processes makes certification of these properties a challenging task. In this work, we experimentally certify coherence witnesses tailored for quantum systems of increasing dimension, using pairwise overlap measurements enabled by a six-mode universal photonic processor fabricated with a femtosecond laser writing technology. In particular, we show the effectiveness of the proposed coherence and dimension witnesses for qudits of dimensions up to 5. We also demonstrate advantage in a quantum interrogation task, and show it is fueled by quantum contextuality. Our experimental results testify to the efficiency of this novel approach for the certification of quantum properties in programmable integrated photonic platforms

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