Approximate broadcasting of quantum correlations

2017/05/31 by Wei Xie, Kun Fang, Xin Wang +1
Computer Science · Physics and Astronomy · #Broadcasting (networking) #Computer network #Computer science #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum channel #Quantum information #Quantum mechanics #Quantum state #quant-ph

paper · pdf · doi:10.1103/physreva.96.022302

published as Phys. Rev. A 96, 022302 (2017) · 9 pages, comments are welcome; published version

openalex publication_date 2017/08/03 · arxiv created 2017/08/08 · arxiv updated 2017/08/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Broadcasting quantum and classical information is a basic task in quantum information processing, and is also a useful model in the study of quantum correlations including quantum discord. We establish a full operational characterization of two-sided quantum discord in terms of bilocal broadcasting of quantum correlations. Moreover, we show that both the optimal fidelity of unilocal broadcasting of the correlations in an arbitrary bipartite quantum state and that of broadcasting an arbitrary set of quantum states can be formulized as semidefinite programs (SDPs), which are efficiently computable. We also analyze some properties of these SDPs and evaluate the broadcasting fidelities for some cases of interest.

Citations

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