Experimental realization of quantum algorithm for solving linear systems of equations - Pan, Jian; Cao, Yudong; Yao, Xiwei; Li, Zhaokai; Ju, Chenyong; Chen, Hongwei; Peng, Xinhua; Kais, Sabre; Du, Jiangfeng (Physical review. A, Atomic, molecular, and optical physics, 2014)