dorsal/arxiv
View SchemaExperimental Observation of Four-Photon Entangled Dicke State with High Fidelity
| Authors | Nikolai Kiesel, Christian Schmid, Geza Toth, Enrique Solano, Harald Weinfurter |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0606234 |
| URL | https://arxiv.org/abs/quant-ph/0606234 |
| DOI | 10.1103/PhysRevLett.98.063604 |
| Journal | Phys. Rev. Lett. 98, 063604 (2007) |
Abstract
We 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.
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"abstract": "We present the experimental observation of the symmetric four-photon\nentangled Dicke state with two excitations $|D_{4}^{(2)}\u003e$. A simple\nexperimental set-up allowed quantum state tomography yielding a fidelity as\nhigh as $0.844 \\pm 0.008$. We study the entanglement persistency of the state\nusing novel witness operators and focus on the demonstration of a remarkable\nproperty: depending on the orientation of a measurement on one photon, the\nremaining three photons are projected into both inequivalent classes of genuine\ntripartite entanglement, the GHZ and W class. Furthermore, we discuss possible\napplications of $|D_{4}^{(2)}\u003e$ in quantum communication.",
"arxiv_id": "quant-ph/0606234",
"authors": [
"Nikolai Kiesel",
"Christian Schmid",
"Geza Toth",
"Enrique Solano",
"Harald Weinfurter"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.98.063604",
"journal_ref": "Phys. Rev. Lett. 98, 063604 (2007)",
"title": "Experimental Observation of Four-Photon Entangled Dicke State with High Fidelity",
"url": "https://arxiv.org/abs/quant-ph/0606234"
},
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