Remote control of quantum correlations in a two-qubit receiver by a three-qubit sender

2015/11/13 by S. I. Doronin, A. I. Zenchuk
Computer Science · Mathematics · Physics and Astronomy · #Algorithm #Chain (unit) #Combinatorics #Communication source #Computer science #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Qubit #Spin (aerodynamics) #State (computer science) #Statistical physics #Telecommunications #Topology (electrical circuits) #quant-ph

paper · pdf · doi:10.1134/s0040577916080092

19 pages, 6 figures

arxiv created 2015/11/13 · openalex created_date 2016/06/24 · openalex publication_date 2016/08/01 · arxiv updated 2016/09/21 · openalex updated_date 2026/08/05

Abstract

We study remote control of quantum correlations (discord) in a subsystem of two qubits (receiver) via parameters of the initial state of another three-qubit subsystem (sender) connected to the receiver by an inhomogeneous spin s = 1/2 chain. We propose two parameters characterizing the creatable correlations. The first parameter is the discord between the receiver and the remainder of the spin s = 1/2 chain, and it concerns the mutual correlations between these two subsystems. The second parameter is the discord between the two nodes of the receiver and describes the inner correlations of the receiver. We study the dependence of these two discords on the inhomogeneity parameter of the spin chain.

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