Quantum Teleportation between Remote Qubit Memories with Only a Single Photon as a Resource

Quantum teleportation enables the deterministic exchange of qubits via lossy channels. While it is commonly believed that unconditional teleportation requires a preshared entangled qubit pair, here we demonstrate a protocol that is in principle unconditional and requires only a single photon as an e...

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Veröffentlicht in:Physical review letters 2021-04, Vol.126 (13), p.130502-130502, Article 130502
Hauptverfasser: Langenfeld, Stefan, Welte, Stephan, Hartung, Lukas, Daiss, Severin, Thomas, Philip, Morin, Olivier, Distante, Emanuele, Rempe, Gerhard
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Sprache:eng
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Zusammenfassung:Quantum teleportation enables the deterministic exchange of qubits via lossy channels. While it is commonly believed that unconditional teleportation requires a preshared entangled qubit pair, here we demonstrate a protocol that is in principle unconditional and requires only a single photon as an ex-ante prepared resource. The photon successively interacts, first, with the receiver and then with the sender qubit memory. Its detection, followed by classical communication, heralds a successful teleportation. We teleport six mutually unbiased qubit states with average fidelity (F) over bar= (88.3 +/- 1.3)% at a rate of 6 Hz over 60 m.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.126.130502