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Superadditivity of two quantum information resources
Stockholm University, Faculty of Science, Department of Physics. University of Gdańsk, Poland.
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 4
2017 (English)In: Science Advances, ISSN 0036-8156, E-ISSN 2375-2548, Vol. 3, no 9, e1602485Article in journal (Refereed) Published
Abstract [en]

Entanglement is one of the most puzzling features of quantum theory and a principal resource for quantum information processing. It is well known that in classical information theory, the addition of two classical information resources will not lead to any extra advantages. On the contrary, in quantuminformation, a spectacular phenomenon of the superadditivity of two quantum information resources emerges. It shows that quantum entanglement, which was completely absent in any of the two resources separately, emerges as a result of combining them together. We present the first experimental demonstration of this quantum phenomenon with two photonic three-partite nondistillable entangled states shared between three parties Alice, Bob, and Charlie, where the entanglement was completely absent between Bob and Charlie.

Place, publisher, year, edition, pages
2017. Vol. 3, no 9, e1602485
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Other Natural Sciences Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-148904DOI: 10.1126/sciadv.1602485ISI: 000411592600055OAI: oai:DiVA.org:su-148904DiVA: diva2:1158449
Available from: 2017-11-20 Created: 2017-11-20 Last updated: 2017-11-20Bibliographically approved

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