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Quantum State Teleportation for 16 Kilometers
2010/06/25
A joint research team, made up of the scientists from the University of Science and
Technology of China and Tsinghua University, has successfully realized a free-space
teleportation of quantum states over 16 kilometers, or 20 times the range registered in the
preceding world record. The finding, reported in the June 1, 2010 issue of Nature Photonics
as a cover story, confirmed for the first time the feasibility of free-space teleportation of
quantum states over a long distance that is required for the deployment of quantum
information network on a global scale.
In 2007, the team started to work on free-space quantum teleportation of the state of a
photon over a 16 km open-air link between Beijing and Huailai in the Hebei province, and
has achieved a range of key technical breakthroughs, before realizing the teleportation of
quantum state over the longest distance in the world in 2009. Researchers proved the
feasibility of the teleportation of quantum state through the atmosphere, and created a
reliable ground for the future deployment of a quantum information network on a global
scale relying on the relay of satellites.
The study was financed by a range of research programs initiated by Chinese Ministry of
Science and Technology, Chinese Academy of Sciences, and National Natural Science
Foundation. The finding has attracted the attention of international academic communities,
and was reported in numerous international journals, including New Scientist, Physics
Today, and the news portal of the American Physical Society.
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