Quantum state decoding device, method and software-defined quantum communication system

Abstract

The present application provides a quantum state decoding device, method, and software-defined quantum communication system. The device includes: a first optical coupling unit, a time phase to polarization encoding unit, a first transmission optical path, a second optical coupling unit, and a polarization decoding unit. The time phase to polarization encoding unit can convert optical pulses in a time phase-encoded quantum state into optical pulses in a polarization-encoded quantum state, and the polarization decoding unit can decode and output the optical pulses in the polarization-encoded quantum state. The first optical coupling unit and the second optical coupling unit can control the output of optical pulses in a polarization-encoded quantum state from any optical output branch according to quantum communication decoding control instructions. Therefore, the quantum state decoding device described in the embodiments of the present application can output optical pulses in a polarization-encoded quantum state regardless of whether the input is an optical pulse in a time phase-encoded quantum state or an optical pulse in a polarization-encoded quantum state, and input them into the polarization decoding unit for decoding.

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