Propagation of nonclassical correlations across a quantum spin chain

S. Campbell, T. J. G. Apollaro, C. Di Franco, L. Banchi, A. Cuccoli, R. Vaia, F. Plastina, M. Paternostro

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49 Citations (Scopus)
184 Downloads (Pure)

Abstract

We study the transport of quantum correlations across a chain of interacting spin-1/2 particles. As a quantitative figure of merit, we choose a symmetric version of quantum discord and compare it with the transported entanglement, addressing various operating regimes of the spin medium. Discord turns out to be better transported for a wide range of working points and initial conditions of the system. We relate this behavior to the efficiency of propagation of a single excitation across the spin chain. Moreover, we point out the role played by a magnetic field in the dynamics of discord in the effective channel embodied by the chain. Our analysis can be interestingly extended to transport processes in more complex networks and the study of nonclassical correlations under general quantum channels.
Original languageEnglish
Article number052316
Number of pages8
JournalPhysical Review A
Volume84
Issue number5
DOIs
Publication statusPublished - 15 Nov 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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