原子能级粒子数热布局虚拟仿真实验的设计开发与教学实践

本虚拟仿真实验探究稀土离子热耦合能级粒子数随温度的变化规律。使学生掌握温度对原子能级粒子数的影响,并建立温度与荧光强度、荧光强度比之间的关系,深入探究温度对荧光强度和荧光强度比影响的区别和联系,加强对此部分理论知识的理解。进一步将理论知识进行实际应用,利用荧光强度比测量温度。通过本实验的学习,使学生对原子能级性质的理解更加深刻、掌握正确的荧光测试系统搭建过程,光路调节方法以及光谱数据的计算分析方法。激发了学生的学习兴趣,夯实了理论基础,并能学以致用,使学生对知识理解透彻,获得事半功倍的教学效果,仿真实验成绩优秀率达81%。

Effect of Phase Shifted Frequency Modulation on Two Level Atom-Field Interaction

We have studied the effect of phase shifted frequency modulation on two level atom with field interaction using Jaynes-Cummings model.Here the frequency of the interacting field is sinusoidally varying with time with a constant phase.Due to the presence of phase in the frequency modulation,the variation of population inversion with time is different from the standard case.There are no exact collapses and revivals in the variation of population inversion but it oscillates sinusoidally with time.In coherent field atom interaction the population inversion behaves as in the case of Fock state atom interaction,when frequency modulation with a non zero phase is applied.The study done with squeezed field has shown the same behavior of the population inversion.