Proposal for a quantum random number generator using coherent light and a non-classical observable

The prototype quantum random number (random bit) generator (QRNG) consists of one photon at a time falling on 50:50 beam splitter followed by detection in or the other output beams due to irreducible probabilistic nature mechanics. Due difficulties producing single photons demand, practice, pulses weak coherent (laser) light are used. In this paper, we take different approach, that uses moderate light. It is shown QRNG can be implemented performing photon-number parity measurements. For light, probabilities obtaining even odd counts 0.5 each. Photon counting with single-photon resolution performed through use cascade splitters and detectors, as was done recently parity-based interferometry experiment involving We highlight point unlike most quantum-based generators, our proposal does not require classical de-biasing algorithms post-processing generated bit sequence.