Phase-Coding Self-Testing Quantum Random Number Generator  

作　　者：宋萧天 李宏伟 银振强 梁文烨 张春梅 韩云光 陈巍 韩正甫 

机构地区：[1]Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026 [2]Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei 230026

出　　处：《Chinese Physics Letters》2015年第8期6-8,共3页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant Nos 2011CBA00200 and 2011CB921200;the National Natural Science Foundation of China under Grant Nos 61201239,61205118,11304397 and 61475148;the Strategic Priority Research Program(B) of Chinese Academy of Sciences under Grant Nos XDB01030100 and XDB01030300

摘　　要：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.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.

关 键 词：Phase-Coding Self-Testing Quantum Random Number Generator 

分 类 号：O413[理学—理论物理] TP309[理学—物理]