Cut-and-paste restoration of entanglement transmission

Álvaro Cuevas, Andrea Mari, Antonella De Pasquale, Adeline Orieux, Marcello Massaro, Fabio Sciarrino, Paolo Mataloni, and Vittorio Giovannetti
Phys. Rev. A 96, 012314 – Published 11 July 2017

Abstract

The distribution of entangled quantum systems among two or more nodes of a network is a key task at the basis of quantum communication, quantum computation, and quantum cryptography. Unfortunately, the transmission lines used in this procedure can introduce so many perturbations and so much noise in the transmitted signal that they prevent the possibility of restoring quantum correlations in the received messages either by means of encoding optimization or by exploiting local operations and classical communication. In this work we present a procedure which allows one to improve the performance of some of these channels. The mechanism underpinning this result is a protocol which we dub cut and paste, as it consists in extracting and reshuffling the subcomponents of these communication lines, which finally succeed in correcting each other. The proof of this counterintuitive phenomenon, while improving our theoretical understanding of quantum entanglement, also has a direct application in the realization of quantum information networks based on imperfect and highly noisy communication lines. A quantum optics experiment, based on the transmission of single-photon polarization states, is also presented which provides a proof-of-principle test of the proposed protocol.

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  • Received 2 February 2017

DOI:https://doi.org/10.1103/PhysRevA.96.012314

©2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Quantum Information, Science & Technology

Authors & Affiliations

Álvaro Cuevas1, Andrea Mari2, Antonella De Pasquale2, Adeline Orieux1,3, Marcello Massaro1,4, Fabio Sciarrino1, Paolo Mataloni1, and Vittorio Giovannetti2

  • 1Dipartimento di Fisica, Università di Roma La Sapienza, Rome, Italy
  • 2NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, 56127 Pisa, Italy
  • 3LIP6, CNRS, Université Pierre et Marie Curie, Sorbonne Universités, 75005 Paris, France and IRIF, CNRS, Université Paris Diderot, Sorbonne Paris Cité, 75013 Paris, France
  • 4Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany

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Issue

Vol. 96, Iss. 1 — July 2017

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