Experimental Analysis of a 4-Qubit Cluster State

Nikolai Kiesel; Christian Schmid; Ulrich Weber; Otfried Guehne; Geza Toth; Rupert Ursin; Harald Weinfurter

doi:10.1103/PhysRevLett.95.210502

Experimental Analysis of a 4-Qubit Cluster State

Quantum Physics 2007-05-23 v1

Authors: Nikolai Kiesel , Christian Schmid , Ulrich Weber , Otfried Guehne , Geza Toth , Rupert Ursin , Harald Weinfurter

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Abstract

Linear optics quantum logic operations enabled the observation of a four-photon cluster state. We prove genuine four-partite entanglement and study its persistency, demonstrating remarkable differences to the usual GHZ state. Efficient analysis tools are introduced in the experiment, which will be of great importance in further studies on multi-particle entangled states.

Keywords

quantum entanglement quantum optics and quantum information entanglement and local operations

Cite

@article{arxiv.quant-ph/0508128,
  title  = {Experimental Analysis of a 4-Qubit Cluster State},
  author = {Nikolai Kiesel and Christian Schmid and Ulrich Weber and Otfried Guehne and Geza Toth and Rupert Ursin and Harald Weinfurter},
  journal= {arXiv preprint arXiv:quant-ph/0508128},
  year   = {2007}
}

Comments

5 pages, 4 figures, submitted

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