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Title

Quantum entanglement in the triangle network

Authors
Kraft, Tristan
Ritz, Christina
Gühne, Otfried
Huber, Marcus
Published in Physical review, A, Atomic, molecular, and optical physics. 2021, vol. 103, no. 060401
Abstract 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.
Identifiers
arXiv: 2002.03970
Note 7 pages, 1 figure, see related work from Navascues et al.: arXiv:2002.02773, comments are welcome!
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Research group Groupe Brunner
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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 https://archive-ouverte.unige.ch/unige:154981

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Deposited on : 2021-09-27

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