Experimental quantum teleportation over a high-loss free-space channel

Autor(en)

Xiaosong Ma, Sebastian Kropatschek, William Naylor, Thomas Scheidl, J Kofler, Thomas Herbst, Anton Zeilinger, Rupert Ursin

Abstrakt

We present a high-fidelity quantum teleportation experiment over a high-loss free-space channel between two laboratories. We teleported six states of three mutually unbiased bases and obtained an average state fidelity of 0.82(1), well beyond the classical limit of 2/3. With the obtained data, we tomographically reconstructed the process matrices of quantum teleportation. The free-space channel attenuation of 31 dB corresponds to the estimated attenuation regime for a down-link from a low-earth-orbit satellite to a ground station. We also discussed various important technical issues for future experiments, including the dark counts of single-photon detectors, coincidence-window width etc. Our experiment tested the limit of performing quantum teleportation with state-of-the-art resources. It is an important step towards future satellite-based quantum teleportation and paves the way for establishing a worldwide quantum communication network.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Österreichische Akademie der Wissenschaften (ÖAW)

Journal

Optics Express

Band

20

Seiten

23126-23137

Anzahl der Seiten

12

DOI

https://doi.org/10.1364/OE.20.023126

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik, 103025 Quantenmechanik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/8dd3aef9-8511-4f0e-ab18-ac5d130fedf1