摘要
We investigate the correlations between two qubits in the Grover search algorithm with arbitrary initial states by numerical simulation.Using a set of suitable bases,we construct the reduced density matrix and give the numerical expression of correlations relating to the iterations.For different initial states,we obtain the concurrence and quantum discord compared with the success probability in the algorithm.The results show that the initial states affect the correlations and the limit point of the correlations in the searching process.However,the initial states do not influence the whole cyclical trend.
作者
Zhen-Yu Chen
Tian-HuiQiu
Wen-Bin Zhang
Hong-Yang Ma
陈祯羽;邱田会;张文彬;马鸿洋(School of Science,Qingdao University of Technology,Qingdao 266033,China;School of Information and Control Engineering,Qingdao University of Technology.Qingdao 266033,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.11975132 and 61772295)
the Natural Science Foundation of Shandong Province,China(Grant No.ZR2019YQ01)
Shandong Province Higher Educational Science and Technology Program,China(Grant No.J18KZ012).
