Full characterization of a three-photon GHZ state using quantum state tomography

Kevin J. Resch; Philip Walther; Anton Zeilinger

doi:10.1103/PhysRevLett.94.070402

Full characterization of a three-photon GHZ state using quantum state tomography

Quantum Physics 2009-11-10 v1

Authors: Kevin J. Resch , Philip Walther , Anton Zeilinger

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Abstract

We have performed the first experimental tomographic reconstruction of a three-photon polarization state. Quantum state tomography is a powerful tool for fully describing the density matrix of a quantum system. We measured 64 three-photon polarization correlations and used a "maximum-likelihood" reconstruction method to reconstruct the GHZ state. The entanglement class has been characterized using an entanglement witness operator and the maximum predicted values for the Mermin inequality was extracted.

Keywords

quantum tomography quantum entanglement quantum optics and quantum information

Cite

@article{arxiv.quant-ph/0412151,
  title  = {Full characterization of a three-photon GHZ state using quantum state tomography},
  author = {Kevin J. Resch and Philip Walther and Anton Zeilinger},
  journal= {arXiv preprint arXiv:quant-ph/0412151},
  year   = {2009}
}

Comments

3 pages, 3 figures

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