Quantum violation of local causality in urban network with hybrid
photonic technologies
- URL: http://arxiv.org/abs/2109.06823v1
- Date: Tue, 14 Sep 2021 17:06:51 GMT
- Title: Quantum violation of local causality in urban network with hybrid
photonic technologies
- Authors: Gonzalo Carvacho, Emanuele Roccia, Mauro Valeri, Francesco Basso
Basset, Davide Poderini, Claudio Pardo, Emanuele Polino, Lorenzo Carosini,
Michele B. Rota, Julia Neuwirth, Saimon F. Covre da Silva, Armando Rastelli,
Nicol\`o Spagnolo, Rafael Chaves, Rinaldo Trotta and Fabio Sciarrino
- Abstract summary: Two independent sources using different technologies are used to share photonic entangled state among three nodes connected through a 270 m free-space channel and fiber links.
By violating a suitable non-linear Bell inequality, we demonstrate the nonlocal behaviour of the correlations among the nodes of the network.
Our results pave the way towards the realization of more complex networks and the implementation of quantum communication protocols in an urban environment.
- Score: 0.5461681605490603
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum networks play a crucial role for distributed quantum information
processing, enabling the establishment of entanglement and quantum
communication among distant nodes. Fundamentally, networks with independent
sources allow for new forms of nonlocality, beyond the paradigmatic Bell's
theorem. Here we implement the simplest of such networks -- the bilocality
scenario -- in an urban network connecting different buildings with a fully
scalable and hybrid approach. Two independent sources using different
technologies, respectively a quantum dot and a nonlinear crystal, are used to
share photonic entangled state among three nodes connected through a 270 m
free-space channel and fiber links. By violating a suitable non-linear Bell
inequality, we demonstrate the nonlocal behaviour of the correlations among the
nodes of the network. Our results pave the way towards the realization of more
complex networks and the implementation of quantum communication protocols in
an urban environment, leveraging on the capabilities of hybrid photonic
technologies.
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