Realization and characterization of a 2-photon 4-qubit linear cluster state

Giuseppe Vallone; Enrico Pomarico; Paolo Mataloni; Francesco De Martini; Vincenzo Berardi

doi:10.1103/PhysRevLett.98.180502

Realization and characterization of a 2-photon 4-qubit linear cluster state

Quantum Physics 2008-11-05 v1

Authors: Giuseppe Vallone , Enrico Pomarico , Paolo Mataloni , Francesco De Martini , Vincenzo Berardi

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Abstract

We report on the experimental realization of a 4-qubit linear cluster state via two photons entangled both in polarization and linear momentum. This state was investigated by performing tomographic measurements and by evaluating an entanglement witness. By use of this state we carried out a novel nonlocality proof, the so-called ``stronger two observer all versus nothing'' test of quantum nonlocality.

Keywords

quantum entanglement entanglement witnesses bell inequality

Cite

@article{arxiv.quant-ph/0703191,
  title  = {Realization and characterization of a 2-photon 4-qubit linear cluster state},
  author = {Giuseppe Vallone and Enrico Pomarico and Paolo Mataloni and Francesco De Martini and Vincenzo Berardi},
  journal= {arXiv preprint arXiv:quant-ph/0703191},
  year   = {2008}
}

Comments

4 pages, 4 figures

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