Quantum communication system

摘要

A quantum communication system comprising: an emitter configured to emit a plurality of photon pulses in groups of photon pulses, each group of photon pulses emitted over a group time period, each photon pulse having a probability of containing at most one photon; a detector comprising gating means configured to switch the detector between an on state and an off state; wherein the detector is in an on state for at least the duration of two photon pulses during said group time period.