Photon-Photon Entanglement with a Single Trapped Atom

An experiment is performed where a single rubidium atom trapped within a high-finesse optical cavity emits two independently triggered entangled photons. The entanglement is mediated by the atom and is characterized both by a Bell inequality violation of S=2.5, as well as full quantum-state tomograp...

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Bibliographic Details
Published inarXiv.org
Main Authors Weber, B, Specht, H P, Mueller, T, Bochmann, J, Muecke, M, Moehring, D L, Rempe, G
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.11.2008
Subjects
Bell's inequality
Entanglement
Photons
Physics - Quantum Physics
Quantum electrodynamics
Quantum theory
Rubidium
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Summary:An experiment is performed where a single rubidium atom trapped within a high-finesse optical cavity emits two independently triggered entangled photons. The entanglement is mediated by the atom and is characterized both by a Bell inequality violation of S=2.5, as well as full quantum-state tomography, resulting in a fidelity exceeding F=90%. The combination of cavity-QED and trapped atom techniques makes our protocol inherently deterministic - an essential step for the generation of scalable entanglement between the nodes of a distributed quantum network.
ISSN:2331-8422
DOI:10.48550/arxiv.0811.3612