Practical quantum random number generator based on measuring the shot noise of vacuum states

Yong Shen, Liang Tian, and Hongxin Zou
Phys. Rev. A 81, 063814 – Published 16 June 2010

Abstract

The shot noise of vacuum states is a kind of quantum noise and is totally random. In this paper a nondeterministic random number generation scheme based on measuring the shot noise of vacuum states is presented and experimentally demonstrated. We use a homodyne detector to measure the shot noise of vacuum states. Considering that the frequency bandwidth of our detector is limited, we derive the optimal sampling rate so that sampling points have the least correlation with each other. We also choose a method to extract random numbers from sampling values, and prove that the influence of classical noise can be avoided with this method so that the detector does not have to be shot-noise limited. The random numbers generated with this scheme have passed ent and diehard tests.

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  • Received 30 March 2010

DOI:https://doi.org/10.1103/PhysRevA.81.063814

©2010 American Physical Society

Authors & Affiliations

Yong Shen1, Liang Tian1,2, and Hongxin Zou1,*

  • 1Department of Physics, The National University of Defense Technology, Changsha 410073, People’s Republic of China
  • 2College of Optoelectronic Science and Engineering, The National University of Defense Technology, Changsha 410073, People’s Republic of China

  • *hxzou@nudt.edu.cn

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Vol. 81, Iss. 6 — June 2010

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