title: Quantum random bit generation using stimulated Raman scattering.
abstract: Random number sequences are a critical resource in a wide variety of information systems, including applications in cryptography, simulation, and data sampling. We introduce a quantum random number generator based on the phase measurement of Stokes light generated by amplification of zero-point vacuum fluctuations using stimulated Raman scattering. This is an example of quantum noise amplification using the most noise-free process possible: near unitary quantum evolution. The use of phase offers robustness to classical pump noise and the ability to generate multiple bits per measurement. The Stokes light is generated with high intensity and as a result, fast detectors with high signal-to-noise ratios can be used for measurement, eliminating the need for single-photon sensitive devices. The demonstrated implementation uses optical phonons in bulk diamond.
authors.affiliation: Clarendon Laboratory, University of Oxford, Oxford, OX1 3PU, UK.
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Bustard
authors.forename: Doug
authors.initials: D
authors.lastname: Moffatt
authors.forename: Rune
authors.initials: R
authors.lastname: Lausten
authors.forename: Guorong
authors.initials: G
authors.lastname: Wu
authors.forename: Ian A
authors.initials: IA
authors.lastname: Walmsley
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Sussman
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008433:Mathematics; D008962:Models, Theoretical; D055096:Optical Devices; D011789:Quantum Theory; D011897:Random Allocation; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*