= Anton Zeilinger
{c}
{tag=Physicist}
{wiki}
= A. Zeilinger
{c}
{synonym}
<Anton Zeilinger> coauthored an experiment preparing <GHZ states> of three spatially separated <photons>. The distinguishing feature is the <quantum coherence> between the two three-<photon> alternatives: recording the same populations alone would also be compatible with an incoherent mixture. Measurements in additional <polarization> <bases> tested this distinction, making three-party <entanglement> an experimental resource for investigating <local realism>.<Observation of Three-Photon Greenberger-Horne-Zeilinger Entanglement by Dik Bouwmeester and others>[Experimental preparation and polarization-correlation evidence for coherent three-photon entanglement]{ref}
A <physicist> researching <quantum optics> and quantum foundations.<Professional profile of Anton Zeilinger (oeaw.ac.at)>[Forschungsbereiche.]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Anton%20Zeilinger%2C%202019%20%2849085194786%29%20%28cropped%29.jpg?width=250]
{title=Portrait of <Anton Zeilinger>}
{description=CEU / Daniel Vegel; George Yul, existing portrait crop. https://creativecommons.org/licenses/by/2.0/[CC BY 2.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:Anton_Zeilinger,_2019_(49085194786)_(cropped).jpg}
{width=250}
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