Device-independent randomness amplification with a single device

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Publikace nespadá pod Pedagogickou fakultu, ale pod Fakultu informatiky. Oficiální stránka publikace je na webu muni.cz.
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PLESCH Martin PIVOLUSKA Matej

Rok publikování 2014
Druh Článek v odborném periodiku
Časopis / Zdroj Physics Letters A
Fakulta / Pracoviště MU

Fakulta informatiky

Citace
www http://www.sciencedirect.com/science/article/pii/S0375960114008032
Doi http://dx.doi.org/10.1016/j.physleta.2014.08.007
Obor Informatika
Klíčová slova Device independence; Randomness extraction
Popis Expansion and amplification of weak randomness with untrusted quantum devices has recently become a very fruitful topic of research. Here we contribute with a procedure for amplifying a single weak random source using tri-partite GHZ-type entangled states. If the quality of the source reaches a fixed threshold R=log2 (10)R=log2 (10), perfect random bits can be produced. This technique can be used to extract randomness from sources that can't be extracted neither classically, nor by existing procedures developed for Santha–Vazirani sources. Our protocol works with a single fault-free device decomposable into three non-communicating parts, that is repeatedly reused throughout the amplification process.
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