Device-independent randomness extraction from an arbitrarily weak min-entropy source

Varování

Publikace nespadá pod Ústav výpočetní techniky, ale pod Fakultu informatiky. Oficiální stránka publikace je na webu muni.cz.

Autoři	BOUDA Jan PAWLOWSKI Marcin PIVOLUSKA Matej PLESCH Martin
Rok publikování	2014
Druh	Článek v odborném periodiku
Časopis / Zdroj	Phys. Rev. A
Fakulta / Pracoviště MU	Fakulta informatiky
Citace
www	http://journals.aps.org/pra/abstract/10.1103/PhysRevA.90.032313
Doi	http://dx.doi.org/10.1103/PhysRevA.90.032313
Obor	Informatika
Klíčová slova	Device independence; Randomness extraction
Popis	Expansion and amplification of weak randomness play a crucial role in many security protocols. Using quantum devices, such procedure is possible even without trusting the devices used, by utilizing correlations between outcomes of parts of the devices. We show here how to extract random bits with an arbitrarily low bias from single arbitrarily weak min-entropy block source in a device independent setting. To do this we use Mermin devices that exhibit super-classical correlations. The number of devices used scales polynomially in the length of the random sequence n. Our protocol is robust, it can tolerate devices that malfunction with probability decreasing polynomially in n at the cost of minor increase in the number of devices used.
Související projekty:	Weak sources of entanglement and randomness RAQUEL - Randomness and Quantum Entanglement Rozsáhlé výpočetní systémy: modely, aplikace a verifikace III.