Entangled photons in the large
Prof. Dr. Anton Zeilinger (University of Vienna and Austrian Academy of Sciences, Austria)
The technology of entangled photons now allows quantum entanglement experiments over large distances and in higher dimensional Hilbert spaces. Recently, long-distance quantum teleportation between the Canary Islands of La Palma and Tenerife was realized over a distance of 143 km. Such experiments open up the possibility of quantum communication with satellites. In higher-dimensional Hilbert spaces, states with orbital angular momentum (OAM) allow entanglement of very high quantum numbers and entanglements where each photon enjoys a more than 100 dimensional Hilbert space. Most recently, for Bell inequality experiments, the detection loophole was closed, which is an important step for secure quantumcommunication.