SYSTEM FOR QUANTUM COMMUNICATION AND METHOD FOR TRANSMITTING AND RECEIVING QUANTUM SIGNAL

摘要

The present invention relates to a method for transmitting a quantum signal of a quantum transmission apparatus for quantum communications. The method of the present invention comprises the steps of: configuring a set of M circular quadrature amplitude modulation (QAM) coherence states; selecting any one among M number of coherence states in the set of coherence states depending on a message to be transmitted; and transmitting the selected coherence state to a quantum reception apparatus which shares the set of coherence states, wherein the configuring step is to maximize the minimum Euclid distance between the coherence states in variably selected energy.