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Chinese Physics Letters

A Random Number Generator Based on Quantum Entangled Photon Pairs

Ma Hai-Qiang, Wang Su-Mei, Zhang Da, Chang Jun-Tao, Ji Ling-Ling, Yanxue Hou, Ling-An Wu

Published Sep 30, 2004• 45 citations
Publisher

Abstract

A new scheme for a random number generator based on quantum entangled photon pairs is demonstrated. Signal photons produced by optical parametric down-conversion are detected at two single-photon detectors after transmission or reflection at a 50/50% beamsplitter, to form a truly random binary sequence. Their arrival is signalled by their twin idler photons, so that a cw laser source may be used instead of attenuated laser pulses. Coincidence measurement is employed to obtain the bit sequences, which are shown to fully satisfy the standard tests for randomness.

DOI
10.1088/0256-307x/21/10/027

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