A Random Number Generator Based on Quantum Entangled Photon Pairs
MA Hai-Qiang1, WANG Su-Mei1,2, ZHANG Da1, CHANG Jun-Tao1, JI Ling-Ling1, HOU Yan-Xue1, WU Ling-An1
1Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Laboratory of Atomic and Molecular Physics, College of Physics and Electronics,Shandong Normal University, Ji’nan 250014
A Random Number Generator Based on Quantum Entangled Photon Pairs
MA Hai-Qiang1;WANG Su-Mei1,2;ZHANG Da1;CHANG Jun-Tao1;JI Ling-Ling1;HOU Yan-Xue1;WU Ling-An1
1Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
2Laboratory of Atomic and Molecular Physics, College of Physics and Electronics,Shandong Normal University, Ji’nan 250014
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.
MA Hai-Qiang;WANG Su-Mei;ZHANG Da;CHANG Jun-Tao;JI Ling-Ling;HOU Yan-Xue;WU Ling-An. A Random Number Generator Based on Quantum Entangled Photon Pairs[J]. 中国物理快报, 2004, 21(10): 1961-1964.
MA Hai-Qiang, WANG Su-Mei, ZHANG Da, CHANG Jun-Tao, JI Ling-Ling, HOU Yan-Xue, WU Ling-An. A Random Number Generator Based on Quantum Entangled Photon Pairs. Chin. Phys. Lett., 2004, 21(10): 1961-1964.
2004, Vol. 21 
