Progress in reliability and usability of quantum teleportation

Science News : The use of quantum entanglement to transmit information via quantum teleportation is a major area of experimentation. Two experiments have presented major steps forward in teleportation’s potential usefulness. In the first, Andreas Wallraff of ETH Zurich in Switzerland and his colleagues have created a solid-state device that teleports quantum information between entangled microwaves on a pair of circuits. Changing the state of the signal on the first circuit let them evaluate the second signal to determine the original state of the first signal. The system’s transmission rate is nearly 10 000 events per second, with a very high success rate. In the second experiment, Akira Furusawa of the University of Tokyo and his colleagues showed a transmission success rate nearly 50 times higher than current teleportation systems. Teleportation without noticeable loss of signal and the ability to manufacture solid-state, computer-chip-like components capable of teleportation will be necessary for the development of quantum computers and communications.