Dispensing of quantum information beyond no-broadcasting theorem - is it possible to broadcast anything genuinely quantum?

作     者：Heinosaari, Teiko Jenčová, Anna Plávala, Martin 

作者机构：Quantum Algorithms and Software VTT Technical Research Centre of Finland Ltd Finland Department of Physics and Astronomy University of Turku Turku20014 Finland Mathematical Institute Slovak Academy of Sciences Bratislava Slovakia Naturwissenschaftlich-Technische Fakultät Universität Siegen Siegen57068 Germany 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2022年

核心收录：

主　　题：Broadcasting 

摘      要：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. Copyright © 2022, The Authors. All rights reserved.