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9 March 2022 Quantum violation of local causality in urban network with hybrid photonic technologies
Gonzalo Carvacho, Francesco Basso Basset, Mauro Valeri, Emanuele Roccia, Davide Poderini, Julia Neuwirth, Emanuele Polino, Michele B. Rota, Valerio Muredda, Claudio Pardo, Lorenzo Carosini, Saimon F. Covre da Silva, Nicolò Spagnolo, Armando Rastelli, Rafael Chaves, Rinaldo Trotta, Fabio Sciarrino
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Proceedings Volume PC12015, Quantum Computing, Communication, and Simulation II; PC120150Z (2022) https://doi.org/10.1117/12.2624583
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
Quantum networks play a crucial role for distributed quantum information processing, enabling the establishment of entanglement and quantum communication among distant nodes. Firstly, we use a coherently driven quantum dot to experimentally demonstrate a modified Ekert quantum key distribution protocol with two quantum channel approaches: both a 250-m-long single-mode fiber and in free-space, connecting two buildings within the campus of Sapienza University in Rome. Second, we included an independent SPDC source to construct a hybrid network (quantum dot and SPDC) to violating a suitable non-linear Bell inequality, thus demonstrating the nonlocal behavior of the correlations among the nodes of the network.
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Gonzalo Carvacho, Francesco Basso Basset, Mauro Valeri, Emanuele Roccia, Davide Poderini, Julia Neuwirth, Emanuele Polino, Michele B. Rota, Valerio Muredda, Claudio Pardo, Lorenzo Carosini, Saimon F. Covre da Silva, Nicolò Spagnolo, Armando Rastelli, Rafael Chaves, Rinaldo Trotta, and Fabio Sciarrino "Quantum violation of local causality in urban network with hybrid photonic technologies", Proc. SPIE PC12015, Quantum Computing, Communication, and Simulation II, PC120150Z (9 March 2022); https://doi.org/10.1117/12.2624583
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KEYWORDS
Quantum key distribution
Entangled states
Nonlinear crystals
Optical fibers
Photonic crystal devices
Photonic crystals
Photons
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