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Title: Efficient and robust quantum random number generation by photon number detection

We present an efficient and robust quantum random number generator based upon high-rate room temperature photon number detection. We employ an electric field-modulated silicon avalanche photodiode, a type of device particularly suited to high-rate photon number detection with excellent photon number resolution to detect, without an applied dead-time, up to 4 photons from the optical pulses emitted by a laser. By both measuring and modeling the response of the detector to the incident photons, we are able to determine the illumination conditions that achieve an optimal bit rate that we show is robust against variation in the photon flux. We extract random bits from the detected photon numbers with an efficiency of 99% corresponding to 1.97 bits per detected photon number yielding a bit rate of 143 Mbit/s, and verify that the extracted bits pass stringent statistical tests for randomness. Our scheme is highly scalable and has the potential of multi-Gbit/s bit rates.
Authors:
 [1] ;  [2] ; ; ; ;  [1] ;  [3]
  1. Cambridge Research Laboratory, Toshiba Research Europe Limited, 208 Cambridge Science Park, Milton Road, Cambridge CB4 0GZ (United Kingdom)
  2. (United Kingdom)
  3. Cavendish Laboratory, University of Cambridge, 19 JJ Thomson Avenue, Cambridge CB3 0HE (United Kingdom)
Publication Date:
OSTI Identifier:
22489106
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMINO ACIDS; COMPUTER CODES; DEAD TIME; DETECTION; EFFICIENCY; ELECTRIC FIELDS; EMISSION; ILLUMINANCE; PHOTONS; PULSES; RANDOMNESS; RESOLUTION; SILICON; SIMULATION; TEMPERATURE RANGE 0273-0400 K