High-fidelity transmission of entanglement over a high-loss free-space channel

By Alessandro Fedrizzi, Rupert Ursin, T. Herbst, M. Nespoli, R. Prevedel, Thomas Scheidl, F. Tiefenbacher, T. Jennewein, Anton Zeilinger. 2009

203 citations recorded by the source corpus.

An experiment distributing entangled photons over 144 km significantly raises the bar on distance, channel loss and transmission time—encouraging news with regard to future long-distance quantum-communication networks.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/378b6c86d0ea497df81bed6d778ca8cc132e9a96

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Artificial Intelligence

In Atomic and Molecular Physics, and Optics

Citations in the corpus

A Survey on Quantum Channel Capacities (2018, background): “As a result, if the two entangled qubits are separated in the distance, for example 144 km terrestial distance [158] or earth-station to satellite 1200 km distance [561], information can be secretly transmitted over two locations, where there exists entanglement between the two locations.”
Micius quantum experiments in space (2022, background): “A further experiment from the same group upgraded the BBO crystal into a more efficient down-conversion crystal, i.e., periodically poled KTiOPO4, which generated entangled photons at ∼1 MHz and sent the two photons through the freespace channel across 144 km (Fedrizzi et al., 2007, 2009).”
Quantum teleportation over 143 kilometres using active feed-forward (2012, methodology): “Quantum teleportation is based on the simultaneous creation of at least three photons, which for random photon pair sources reduces the count rate by several orders of magnitude compared to experiments using only two photons 16,19 .”