Experimental entanglement of six photons in graph states
Abstract
Graph statesmultipartite entangled states that can be represented by mathematical graphsare important resources for quantum computation, quantum error correction, studies of multiparticle entanglement and fundamental tests of nonlocality and decoherence. Here, we demonstrate the experimental entanglement of six photons and engineering of multiqubit graph states. We have created two important examples of graph states, a sixphoton GreenbergerHorneZeilinger state, the largest photonic Schrödinger cat so far, and a sixphoton cluster state, a stateoftheart `oneway quantum computer'. With small modifications, our method allows us, in principle, to create various further graph states, and therefore could open the way to experimental tests of, for example, quantum algorithms or loss and faulttolerant oneway quantum computation.
 Publication:

Nature Physics
 Pub Date:
 February 2007
 DOI:
 10.1038/nphys507
 arXiv:
 arXiv:quantph/0609130
 Bibcode:
 2007NatPh...3...91L
 Keywords:

 Quantum Physics
 EPrint:
 Nature Physics 3, 9195 (2007).