Researchers Build Quantum Info Bank By Writing on the Clouds

摘要

An information theorist doesn't care whether a quantum bit is stored on particles of matter or particles of light. But to an experimentalist, it's a very big deal where your qubit is stored because slow but long-lived chunks of matter have very different properties from those of quick but evanescent photons. Now, two physicists have shown how they can reliably transfer quantum information from matter to light. The procedure may soon enable scientists to exploit the advantages of both matter and light in building systems for quantum communications.