Entanglement detection via continuous quantum channels

D. Duran, A. Verçin, and S. Yılmaz
Phys. Rev. A 90, 042320 – Published 16 October 2014

Abstract

For any NN-type bipartite system with even N>2, two-parameter continuous families of unital block-dephasing quantum channels and of weakly optimal entanglement witnesses are constructed from special forms of a parametrized positive map. The parameter domains of the families are complementary subsets of a convex set and this fact reveals unusual combination rules of quantum channels and entanglement witnesses. These rules make it possible to develop many physically implementable direct entanglement-detection methods that provide a unified framework to accomplish both information-processing and entanglement-detection tasks by means of smooth quantum channels, without any reference to entanglement witnesses.

  • Figure
  • Received 8 August 2014

DOI:https://doi.org/10.1103/PhysRevA.90.042320

©2014 American Physical Society

Authors & Affiliations

D. Duran1,2,*, A. Verçin1,†, and S. Yılmaz1,3,‡

  • 1Department of Physics, Ankara University, Faculty of Sciences, 06100, Tandoğan-Ankara, Turkey
  • 2Department of Physics, Bozok University, Faculty of Sciences and Art 66200, Yozgat, Turkey
  • 3Department of Physics, Amasya University, Faculty of Sciences and Art 05100, Amasya, Turkey

  • *durgun.duran@bozok.edu.tr
  • vercin@science.ankara.edu.tr
  • soyilmaz@ankara.edu.tr

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Issue

Vol. 90, Iss. 4 — October 2014

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