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arXiv · 1301.7722

Robust amplification of Santha-Vazirani sources with three devices

Piotr Mironowicz·Rodrigo Gallego·Marcin Pawlowski
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Abstract

We demonstrate that amplification of arbitrarily weak randomness is possible using quantum resources. We present a randomness amplification protocol that involves Bell experiments. We find a Bell inequality which can amplify arbitrarily weak randomness and give a detailed analysis of the protocol involving it. Our analysis includes finding a sufficient violation of Bell inequality as a function of the initial quality of randomness. It has a very important property that for any quality the required violation is strictly lower than possible to obtain using quantum resources. Among other things, it means that the protocol takes a finite amount of time to amplify arbitrarily weak randomness.

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Piotr Mironowicz, Rodrigo Gallego, Marcin Pawlowski. 2015-04-27. Robust amplification of Santha-Vazirani sources with three devices. https://doi.org/10.1103/physreva.91.032317

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