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Proceedings Paper

143 km free-space quantum teleportation
Author(s): Thomas Herbst; Xiao-Song Ma; Thomas Scheidl; Bernhard Wittmann; Rupert Ursin; Anton Zeilinger
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Paper Abstract

In the field of quantum communication the teleportation1 of single quanta plays a fundamental role in numerous quantum information-processing protocols. Quantum teleportation allows to faithfully transfer unknown quantum states over arbitrary distances and constitutes a method to circumvent the no-cloning theorem2. Even formally completely independent particles can become entangled via the process of entanglement swapping3. In a future quantum communication network4 this will be of utmost importance, enabling quantum computers to become globally interconnected. In order to prove the feasibility of quantum teleportation under optical link attenuations that will arise in a future space-application scenario, we extended the communication distance to 143 km, employing an optical free-space link between the two Canary Islands of La Palma and Tenerife. This work proofs the feasibility of ground-based freespace quantum teleportation. With our setup we were able to achieve coincidence production rates and fidelities to cope with the optical link attenuation, resulting from various experimental and technical challenges, which will arise in a quantum transmission between a ground-based transmitter and a low-earth-orbiting satellite receiver5. In our experiment we gained an average state fidelity for the teleported quantum states of more than 6 standard deviations beyond the classical limit of 2/3 and a process fidelity of 0.710(42). We expect that many of the features implemented in this experiment will be key blocks for future investigations.

Paper Details

Date Published: 8 October 2014
PDF: 7 pages
Proc. SPIE 9225, Quantum Communications and Quantum Imaging XII, 92250H (8 October 2014); doi: 10.1117/12.2061981
Show Author Affiliations
Thomas Herbst, Univ. of Vienna (Austria)
Institute for Quantum Optics and Quantum Information (Austria)
Xiao-Song Ma, Yale Univ. (United States)
Thomas Scheidl, Institute for Quantum Optics and Quantum Information (Austria)
Bernhard Wittmann, Univ. of Vienna (Austria)
Institute for Quantum Optics and Quantum Information (Austria)
Rupert Ursin, Institute for Quantum Optics and Quantum Information (Austria)
Anton Zeilinger, Univ. of Vienna (Austria)
Institute for Quantum Optics and Quantum Information (Austria)


Published in SPIE Proceedings Vol. 9225:
Quantum Communications and Quantum Imaging XII
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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