量子Baker映射的量子仿真及其干扰的动态抑制  

Dynamical suppression of imperfections in the quantum simulation of the quantum baker's map

作　　者：叶宾[1] 马小平[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《控制理论与应用》2009年第5期515-520,共6页Control Theory & Applications

基　　金：中国矿业大学青年科研基金资助项目(2008A018);中国矿业大学人才引进基金资助项目.

摘　　要：量子信息处理系统中存在的各种干扰严重阻碍了量子计算技术的发展.在比较静态干扰和随机噪声干扰对量子面包师映射(quantum baker’s map)量子仿真算法不同影响的基础上,利用动态解耦法抑制量子计算中的静态干扰.由于随机噪声干扰对量子仿真算法有较小的破坏作用,因此利用随机动力学解耦的方法将静态干扰近似转化为随机噪声干扰能够有效抑制静态干扰的破坏作用,提高量子仿真的稳定性.量子态保真度衰减的数值仿真证实了理论分析的正确性.The progress of quantum computation technology is severely prevented by various imperfections. First, the effects of noise errors on the quantum computation of the quantum baker＇s map are compared with those of the static imperfections, and then, the dynamical decoupling methods are employed to tackle the static imperfections. As the noise errors are less destructive to the quantum simulation algorithm , the randomized dynamical control is used to suppress the disturbance of the static imperfections by equivalently transforming them into noise errors, thus enhancing the stability of the quantum simulation algorithm. Finally, simulation results of the fidelity decay confirm the validity of this method.

关 键 词：量子baker映射 量子仿真 动态解耦控制 稳定性 

分 类 号：TP11[自动化与计算机技术—控制理论与控制工程] O413[自动化与计算机技术—控制科学与工程]