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A No-History, Low Latency Photonic Quantum Random Bit Generator for Use in a Loophole Free Bell Tests and General Applications

  • Mario StipčevićEmail author
  • Rupert Ursin
Chapter
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Part of the Quantum Science and Technology book series (QST)

Abstract

Random numbers are essential for our modern information-based society. Unlike frequently used pseudo-random generators, physical random number generators do not depend on deterministic algorithms but rather on a physical process to provide true randomness. In this work we present a conceptually simple optical quantum random number generator that features special characteristics necessary for application in a loophole-free Bell inequality test, namely: (1) very short latency between the request for a random bit and time when the bit is generated; (2) all physical processes relevant to the bit production happen after the bit request signal; and (3) high efficiency of producing a bit upon a request (100% by design). This generator is characterized by further desirable characteristics: ability of high bit generation rate, possibility to use a low detection-efficiency photon detector, a high ratio of number of bits per detected photon (≈2) and simplicity of the bit generating process. Generated sequences of random bits pass NIST STS test without further postprocessing.

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Photonics and Quantum Optics Unit of the Center of Excellence for Advanced Materials and Sensing DevicesRuđer Bošković InstituteZagrebCroatia
  2. 2.Institute for Quantum Optics and Quantum Information, Austrian Academy of SciencesViennaAustria

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