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?




AuthorsHeinosaari Teiko, Jenčová Anna, Plávala Martin

PublisherIOP Publishing Ltd

Publication year2023

JournalJournal of Physics A: Mathematical and Theoretical

Journal name in sourceJOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL

Journal acronymJ PHYS A-MATH THEOR

Article number 135301

Volume56

Issue13

Number of pages20

ISSN1751-8113

eISSN1751-8121

DOIhttps://doi.org/10.1088/1751-8121/acbc5b

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/179380228


Abstract

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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Last updated on 2024-26-11 at 20:01