Phase-Coding Self-Testing Quantum Random Number Generator
SONG Xiao-Tian1,2, LI Hong-Wei1,2, YIN Zhen-Qiang1,2**, LIANG Wen-Ye1,2, ZHANG Chun-Mei1,2, HAN Yun-Guang1,2, CHEN Wei1,2**, HAN Zheng-Fu1,2
1Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026 2Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026
Abstract：How to estimate the randomness of the measurement outcomes generated by a given device is an important issue in quantum information theory. Recently, Brunner et al. [Phys. Rev. Lett. 112 (2014) 140407] proposed a prepare-and-measure quantum random number generation scenario with device-independent assumption, which indicates a method to test the randomness of bit strings according to the generation process rather than the results. Based on this protocol, we implement a quantum random number generator with an intrinsic stable phase-encoded quantum key distribution system. The system has been continuously running for more than 200 h, a stable witness W with the average value of 0.9752 and a standard deviation of 0.0024 are obtained. More than 1 G random bits are generated and the results pass all items of NIST test suite.
2015, Vol. 32 
