SYSTEMS AND METHODS FOR QUANTUM COMMUNICATION

Disclosed a quantum-communication transmitter system comprising a light source configured to generate coherent light, a Mach-Zehnder modulator optically coupled to the light source and configured to simultaneously modulate phase and amplitude of the coherent light generated by said light source, and a driving unit electrically coupled to the Mach-Zehnder modulator and configured to apply electric modulating voltage signals to one single modulating input of the Mach-Zehnder modulator, to thereby cause the Mach-Zehnder modulator to generate phase and amplitude modulated coherent light pulses for implementing a four quantum states time-bin encoding scheme for qubits transmission over a quantum communication channel.