Experimental certification of millions of genuinely entangled atoms in a solid

The presence of entanglement in macroscopic systems is notoriously difficult to observe. Here, the authors develop a witness which allow them to demonstrate entanglement between millions of atoms in a solid-state quantum memory prepared by the heralded absorption of a single photon.

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Auteurs principaux: Florian Fröwis, Peter C. Strassmann, Alexey Tiranov, Corentin Gut, Jonathan Lavoie, Nicolas Brunner, Félix Bussières, Mikael Afzelius, Nicolas Gisin
Format: article
Langue:EN
Publié: Nature Portfolio 2017
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Q
Accès en ligne:https://doaj.org/article/db2150b873424a7293c4e3fa6136e8f4
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Résumé:The presence of entanglement in macroscopic systems is notoriously difficult to observe. Here, the authors develop a witness which allow them to demonstrate entanglement between millions of atoms in a solid-state quantum memory prepared by the heralded absorption of a single photon.