两能级封闭量子系统任意量子态的最优制备  

Optimal preparation of arbitrary quantum state of two-level closed quantum system

作　　者：陈宗海[1] 朱明清[1] 张陈斌[1] 董道毅[1] 

机构地区：[1]中国科学技术大学自动化系,合肥230027

出　　处：《控制与决策》2007年第8期912-917,共6页Control and Decision

摘　　要：在分析单量子位的Bloch球面表示的基础上,结合量子门实现量子态幺正演化的量子态调控机制,提出一种针对两能级封闭量子系统任意量子态的最优制备策略.该策略首先建立两能级量子系统及其控制场的模型;然后借助李群李代数,由经典最优控制的思想和约化动力学来获得最优控制,从而达到两能级封闭量子系统任意量子态的最优制备.理论分析与仿真实验表明了该策略的优越性.Based on analyzing the presentation of the single quantum state on Bloch sphere, a strategy of optimal preparation of arbitrary quantum state of two-level closed quantum systems is proposed. With the help of quantum mechanical logic gate, manipulation of quantum system is realized, on unitary-evolution. The models of two-level quantum systems and its control systems are set up, Then, by using the Lie group, and with classical control theory and dynamics of quantum system, a strategy of optimal preparation of arbitrary quantum state is developed. The theoretical analysis and the simulation of the preparation show the advantage of the idea.

关 键 词：两能级量子系统 量子调控 最优控制 最优制备 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]