利用相位可控光场实现量子态波函数时域演化的量子控制  

Implementing quantum control for the temporal evolution of the wave function of the quantum state by using a phase-controlled light field

作　　者：李永放[1] 任立庆[1] 马瑞琼[1] 樊荣[1] 刘娟[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,西安710062

出　　处：《物理学报》2010年第3期1671-1676,共6页Acta Physica Sinica

基　　金：陕西省自然科学基金(批准号:2007A04)资助的课题~~

摘　　要：研究了相位可控光场与二能级原子相互作用问题.解析地描述了激发态布居概率在时域的量子衍射现象;细致地分析了波函数演化规律的物理内涵.利用波函数的Cornu蜷线和波函数的实部和虚部随时间的演化形式,展示了原子极化过程的物理细节.阐明了相位可控光场对波函数的时域演化过程、原子极化过程以及光场传输过程的操控机理.We investigate the interaction between a two-level atomic system and a phase controllable light field. The quantum diffraction of the population probability for the excited state is described analytically. The physical sense of the wave function evolution is analyzed in detail. The polarization of the atoms is shown with the help of Cornuspiral of the wave function and the temporal evolut ion of the real and imaginary part for the wave function. It is shown that the polarization of the atoms and the temporal evolution of the wave function as well as the propagation of light can be controlled by manipulating the phase of the light field.

关 键 词：量子衍射 量子控制 原子极化 

分 类 号：O431.2[机械工程—光学工程]