Scientific article
Open access

Partial Self-Testing and Randomness Certification in the Triangle Network

Published inPhysical review letters, vol. 131, no. 10, 100201
Publication date2023
First online date2023-09-05

Quantum nonlocality can be demonstrated without inputs (i.e., each party using a fixed measurement setting) in a network with independent sources. Here we consider this effect on ring networks, and show that the underlying quantum strategy can be partially characterized, or self-tested, from observed correlations. Applying these results to the triangle network allows us to show that the nonlocal distribution of Renou et al. [Phys. Rev. Lett. 123, 140401 (2019)] requires that (i) all sources produce a minimal amount of entanglement, (ii) all local measurements are entangled, and (iii) each local outcome features a minimal entropy. Hence we show that the triangle network allows for genuine network quantum nonlocality and certifiable randomness.

  • Network, quantum
  • Entanglement
  • Entropy
  • Nonlocal
  • Correlation
Research group
Citation (ISO format)
SEKATSKI, Pavel, BOREIRI, Sadra, BRUNNER, Nicolas. Partial Self-Testing and Randomness Certification in the Triangle Network. In: Physical review letters, 2023, vol. 131, n° 10, p. 100201. doi: 10.1103/PhysRevLett.131.100201
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Article (Published version)
ISSN of the journal0031-9007

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