Submission + - Photon-transistors exchange data between photons (eurekalert.org)
gregor-e writes: Scientist from the Niels Bohr Institute at University of Copenhagen and from Harvard University have come up with a way for photons to exchange data. Normally, photons pass right by each other without interacting. What these guys have done is establish a means of transferring information from one photon to another by using a single atom intermediary. This provides a step toward practical quantum computation, by allowing the signals to be purely optical in nature.