Despite the satirical title, teams of Physicists from the U. of Calgary and the Tokyo Institute of Technology recently published papers (and here) detailing their feat of storing a ‘squeezed vacuum’ by apparently reducing the amplitude of a quantum-mechanically interpreted EM wave to zero. ScienceNow has a more clear detailing (with pictures) than I seem to be able to give, and the /. article may provide further illumination.
The researchers suggest that this technique may be able to be used to facilitate a more secure transmission of secret keys between end hosts in the years to come.
Indeed – this sounds a little bit like quantum entanglement, where you can have two systems in a mutually related quantum state without locality. The difficulty, however, seems to be in using this technique to actually transfer information. So far, it seems that even though a quantum-entangled system can determine the outcome of one measurement as soon as the other is performed, it seems that it is not possible to use this to transmit information.