Patent ID: 7330653
Filing Date: 2008-02-12
Classification: H04B

Abstract:
1. A Quantum Dense Coding System, comprising: a) a source, capable of down-converting a pump photon into a signal photon and an idler photon that have a common frequency, capable of time separating said signal photon and said idler photon so that said signal photon and said idler photon do not overlap in said QDCS, and capable of outputting probability amplitudes, said signal photon and said idler photon, wherein said signal photon and said idler photon have an equal probability of outputting to a transmission channel and a reception channel; b) a transmitter, operatively coupled to said source, capable of receiving probability amplitudes, signal photons and idler photons from said transmission channel, capable of selectively changing vertical and horizontal phases of probability amplitudes, signal photons and idler photons, and capable of outputting probability amplitudes, signal photons and idler photons; c) a receiver, operatively coupled to said transmitter and said source, capable of receiving probability amplitudes, signal photons and idler photons from said reception channel and said transmitter, and capable of identifying vertical and horizontal phase changes created by said transmitter.