Observation of eight-photon entanglement
arXiv:1105.6318 · doi:10.1038/nphoton.2011.354
Abstract
Using ultra-bright sources of pure-state entangled photons from parametric down conversion, an eight-photon interferometer and post-selection detection, we demonstrate the ability to experimentally manipulate eight individual photons and report the creation of an eight-photon Schrödinger cat state with an observed fidelity of $0.708 \pm 0.016$.
6 pages, 4 figures