Special issue: Proceedings of the International Meeting on Quantum Information Science – Foundations of Quantum Information; University of Camerino, Camerino, Italy, 16—19 April 2004No Access

EXPERIMENTAL PROPOSAL OF SWITCHED "DELAYED-CHOICE" FOR ENTANGLEMENT SWAPPING

THOMAS JENNEWEIN

Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Boltzmanngasse 3, A–1090 Wien, Austria

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ČASLAV BRUKNER

Optics Section, The Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2BW, United Kingdom

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MARKUS ASPELMEYER

Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, A–1090 Wien, Austria

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ANTON ZEILINGER

Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, A–1090 Wien, Austria

Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Boltzmanngasse 3, A–1090 Wien, Austria

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https://doi.org/10.1142/S0219749905000505Cited by:7 (Source: Crossref)

Abstract

Entanglement swapping is a fascinating generalization of quantum teleportation, where the entanglement between pairs is interchanged leading to entanglement between particles that never interacted. Extending the idea of Peres, we propose an experimental setup where the choice which quantum systems are finally entangled is made at a time after they have been registered and do not even exist anymore. Our proposed setup can be used in Third-Man Quantum Cryptography where a third party can control whether Alice and Bob are able to communicate secretly, but he does know their secret key.

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