Quantum nonlocality obtained from local states by entanglement purification

P. Walther; K. J. Resch; C. Brukner; A. M. Steinberg; J. -W. Pan; A. Zeilinger

doi:10.1103/PhysRevLett.94.040504

Quantum nonlocality obtained from local states by entanglement purification

Quantum Physics 2009-11-11 v1

Authors: P. Walther , K. J. Resch , C. Brukner , A. M. Steinberg , J. -W. Pan , A. Zeilinger

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Abstract

We have applied an entanglement purification protocol to produce a single entangled pair of photons capable of violating a CHSH Bell inequality from two pairs that individually could not. The initial poorly-entangled photons were created by a controllable decoherence that introduced complex errors. All of the states were reconstructed using quantum state tomography which allowed for a quantitative description of the improvement of the state after purification.

Keywords

quantum entanglement bell inequality bell's theorem

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@article{arxiv.quant-ph/0502026,
  title  = {Quantum nonlocality obtained from local states by entanglement purification},
  author = {P. Walther and K. J. Resch and C. Brukner and A. M. Steinberg and J. -W. Pan and A. Zeilinger},
  journal= {arXiv preprint arXiv:quant-ph/0502026},
  year   = {2009}
}

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4 pages, 4 figures

Quantum nonlocality obtained from local states by entanglement purification

Abstract

Keywords

Cite

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