Scientific article
Open access

Quantum entanglement in the triangle network

Published inPhysical Review. A, vol. 103, no. 060401
Publication date2021

Beyond future applications, quantum networks open interesting fundamental perspectives, notably novel forms of quantum correlations. In this work we discuss quantum correlations in networks from the perspective of the underlying quantum states and their entanglement. We address the questions of which states can be prepared in the so-called triangle network, consisting of three nodes connected pairwise by three sources. We derive necessary criteria for a state to be preparable in such a network, considering both the cases where the sources are statistically independent and classically correlated. This shows that the network structure imposes strong and non-trivial constraints on the set of preparable states, fundamentally different from the standard characterization of multipartite quantum entanglement.

  • arxiv : quant-ph
Note7 pages, 1 figure, see related work from Navascues et al.: arXiv:2002.02773, comments are welcome!
Research group
Citation (ISO format)
KRAFT, Tristan et al. Quantum entanglement in the triangle network. In: Physical Review. A, 2021, vol. 103, n° 060401. doi: 10.1103/PhysRevA.103.L060401
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Article (Accepted version)
ISSN of the journal1050-2947

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