Patent ID: 8068741
Filing Date: 2011-11-29
Classification: H04L

Abstract:
1. A quantum cryptography system comprising: a sending unit adapted to generate polarization-encoded qubits; a polarization-to-phase converter operatively coupled to the sending unit and adapted to receive the polarization-encoded qubits and transform them to phase-encoded qubits; and a receiving unit operatively coupled to the polarization-to-phase converter and adapted to: a) receive the phase-encoded qubits from the polarization-to-phase converter; b) split each phase-encoded qubit into a pair of first and second phase-encoded qubits; c) randomly phase-modulate one of the phase-encoded qubits in the pair with one of a limited number of select phase modulations; d) combine the first and second phase-encoded qubits so that they interfere; and e) detect the interfered first and second phase-encoded qubits.