A1 Refereed original research article in a scientific journal
Dispensing of quantum information beyond no-broadcasting theorem-is it possible to broadcast anything genuinely quantum?
Authors: Heinosaari Teiko, Jenčová Anna, Plávala Martin
Publisher: IOP Publishing Ltd
Publication year: 2023
Journal: Journal of Physics A: Mathematical and Theoretical
Journal name in source: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
Journal acronym: J PHYS A-MATH THEOR
Article number: 135301
Volume: 56
Issue: 13
Number of pages: 20
ISSN: 1751-8113
eISSN: 1751-8121
DOI: https://doi.org/10.1088/1751-8121/acbc5b
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/179380228
No-broadcasting theorem is one of the most fundamental results in quantum information theory; it guarantees that the simplest attacks on any quantum protocol, based on eavesdropping and copying of quantum information, are impossible. Due to the fundamental importance of the no-broadcasting theorem, it is essential to understand the exact boundaries of this limitation. We generalize the standard definition of broadcasting by restricting the set of states which we want to broadcast and restricting the sets of measurements which we use to test the broadcasting. We show that in some of the investigated cases broadcasting is equivalent to commutativity, while in other cases commutativity is not necessary.
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