Loss-tolerant measurement-device-independent quantum random number generation. (17th December 2015)

• Record Type: Journal Article
• Authors: Cao, Zhu; Zhou, Hongyi; Ma, Xiongfeng
• Is Part Of: New journal of physics. Volume 17:Number 12(2015:Dec.)
• Publication Date: 2015-12-17
• Subjects: quantum randomness -- measurement-device-independent -- measurement tomography -- loss tolerant; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/17/12/125011
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: Quantum random number generators (QRNGs) output genuine random numbers based upon the uncertainty principle. A QRNG contains two parts in general—a randomness source and a readout detector. How to remove detector imperfections has been one of the most important questions in practical randomness generation. We propose a simple solution, measurement-device-independent QRNG, which not only removes all detector side channels but is robust against losses. In contrast to previous fully device-independent QRNGs, our scheme does not require high detector efficiency or nonlocality tests. Simulations show that our protocol can be implemented efficiently with a practical coherent state laser and other standard optical components. The security analysis of our QRNG consists mainly of two parts: measurement tomography and randomness quantification, where several new techniques are developed to characterize the randomness associated with a positive-operator valued measure.