Physical Realization of Quantum C-Not Gate

作     者：霍建立 王顺金 陶军 

作者机构：Center of Theoretical Physics School of Physics and Technology Sichuan University Chengdu 610064 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2008年第25卷第3期

页      面：813-816页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Supported in part by the National Natural Science Foundation of China under Grant Nos 90503088 and 10775100  and the Fund of Theoretical Nuclear Center of HIRFL of China 

主　　题：SPIN CLUSTER COMPUTATION QUBITS LOGIC 

摘      要：We investigate a Heisenberg spin cluster with two particles controlled by a time-dependent magnetic field. The system is controlled by tuning the amplitude, frequency, and interaction time of the three-step time-dependent magnetic field. Then we solve the time-dependent Schrodinger equation of the two-particle system, and obtain the time evolution operator. By the three-timestep interaction, the wavefunction evolves from the initial state to the final state, and the total evolution operator can be expressed as a product of the three evolution operators. By adjusting the physical parameters, the key two-qubit logic gate, the C-Not gate, can be realized physically.