Quantum randomness certified by the uncertainty principle

Giuseppe Vallone, Davide G. Marangon, Marco Tomasin, and Paolo Villoresi
Phys. Rev. A 90, 052327 – Published 20 November 2014

Abstract

We present an efficient method to extract the amount of true randomness that can be obtained by a quantum random number generator (QRNG). By repeating the measurements of a quantum system and by swapping between two mutually unbiased bases, a lower bound of the achievable true randomness can be evaluated. The bound is obtained thanks to the uncertainty principle of complementary measurements applied to min-entropy and max-entropy. We tested our method with two different QRNGs by using a train of qubits or ququart and demonstrated the scalability toward practical applications.

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  • Received 9 February 2014
  • Revised 1 November 2014

DOI:https://doi.org/10.1103/PhysRevA.90.052327

©2014 American Physical Society

Authors & Affiliations

Giuseppe Vallone, Davide G. Marangon, Marco Tomasin, and Paolo Villoresi

  • Department of Information Engineering, University of Padova, I-35131 Padova, Italy

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Issue

Vol. 90, Iss. 5 — November 2014

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