Experimental Observation of Four-Photon Entangled Dicke State with High Fidelity

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dc.creatorKiesel, Nikolai
dc.creatorSchmid, Christian
dc.creatorToth, Geza
dc.creatorSolano, Enrique
dc.creatorWeinfurter, Harald
dc.date2006-06-28
dc.date.accessioned2026-07-07T07:45:26Z
dc.date.available2026-07-07T07:45:26Z
dc.descriptionWe present the experimental observation of the symmetric four-photon entangled Dicke state with two excitations $|D_{4}^{(2)}>$. A simple experimental set-up allowed quantum state tomography yielding a fidelity as high as $0.844 \pm 0.008$. We study the entanglement persistency of the state using novel witness operators and focus on the demonstration of a remarkable property: depending on the orientation of a measurement on one photon, the remaining three photons are projected into both inequivalent classes of genuine tripartite entanglement, the GHZ and W class. Furthermore, we discuss possible applications of $|D_{4}^{(2)}>$ in quantum communication.
dc.description5 pages, 3 figures, submitted
dc.identifierhttps://arxiv.org/abs/quant-ph/0606234
dc.identifierhttp://arxiv.org/abs/quant-ph/0606234
dc.identifierPhys. Rev. Lett. 98, 063604 (2007)
dc.identifierdoi:10.1103/PhysRevLett.98.063604
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/123528
dc.subjectQuantum Physics
dc.titleExperimental Observation of Four-Photon Entangled Dicke State with High Fidelity
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