Piotr Mironowicz, Marcin Pawlowski
We demonstrate that amplification of arbitrarily weak randomness is possible using quantum resources. We present a randomness amplification protocol that involves Bell experiments. We report on two Bell inequalities which can amplify arbitrarily weak randomness and give detailed analysis for one of them. Our analysis includes finding a sufficient violation of Bell inequality as a function of the 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 any randomness.
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http://arxiv.org/abs/1301.7722
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