Transport of correlations in a harmonic chain

F. Nicacio and F. L. Semião
Phys. Rev. A 94, 012327 – Published 15 July 2016

Abstract

We study the propagation of different types of correlations through a quantum bus formed by a chain of coupled harmonic oscillators. This includes steering, entanglement, mutual information, quantum discord, and Bell-like nonlocality. The whole system consists of the quantum bus (propagation medium) and other quantum harmonic oscillators (sources and receivers of quantum correlations) weakly coupled to the chain. We are particularly interested in using the point of view of transport to spot distinctive features displayed by different kinds of correlations. We found, for instance, that there are fundamental differences in the way steering and discord propagate, depending on the way they are defined with respect to the parties involved in the initial correlated state. We analyzed both the closed- and open-system dynamics as well as the role played by thermal excitations in the propagation of the correlations.

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  • Received 12 May 2016

DOI:https://doi.org/10.1103/PhysRevA.94.012327

©2016 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Quantum Information, Science & Technology

Authors & Affiliations

F. Nicacio* and F. L. Semião

  • Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, 09210-170, Santo André, São Paulo, Brazil

  • *fernando.nicacio@ufabc.edu.br

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Issue

Vol. 94, Iss. 1 — July 2016

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