Single photons bounced off orbiting satellite
March 18, 2008 | Source: the physics arXiv blog
Physicist Anton Zeilinger’s group in Vienna have announced that they had taken the first step in setting up a global system of decoherence-free, secure quantum communication by bouncing single photons off an orbiting satellite some 1400km above the Earth.
Next step: build and launch a satellite that can produce and transmit entangled photons.