Single-photon nonlocality in quantum networks
- URL: http://arxiv.org/abs/2108.01726v3
- Date: Fri, 8 Apr 2022 15:39:38 GMT
- Title: Single-photon nonlocality in quantum networks
- Authors: Paolo Abiuso, Tam\'as Kriv\'achy, Emanuel-Cristian Boghiu,
Marc-Olivier Renou, Alejandro Pozas-Kerstjens, Antonio Ac\'in
- Abstract summary: We show that the nonlocality of single-photon entangled states can nevertheless be revealed in a quantum network made only of beamsplitters and photodetectors.
Our results show that single-photon entanglement may constitute a promising solution to generate genuine network-nonlocal correlations useful for Bell-based quantum information protocols.
- Score: 55.41644538483948
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The state obtained when a single photon impinges on a balanced beamsplitter
is often known as single-photon entangled and its nonlocal properties have been
the subject of intense debates in the quantum optics and foundations
communities. It is however clear that a standard Bell test made only of passive
optical elements cannot reveal the nonlocality of this state. We show that the
nonlocality of single-photon entangled states can nevertheless be revealed in a
quantum network made only of beamsplitters and photodetectors. In our protocol,
three single-photon entangled states are distributed in a triangle network,
introducing indeterminacy in the photons' paths and creating nonlocal
correlations without the need for measurements choices. We discuss a concrete
experimental realisation and provide numerical evidence of the tolerance of our
protocol to standard noise sources. Our results show that single-photon
entanglement may constitute a promising solution to generate genuine
network-nonlocal correlations useful for Bell-based quantum information
protocols.
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