三能级运动原子与单模场相互作用系统中场(原子)熵的演化

在共振和远离共振情况下,具体讨论了初始平均光子数、原子运动和场模结构参数对三能级运动原子与单模场相互作用系统中场(原子)熵演化的影响.结果显示:原子运动导致场熵演化具有周期性,这种周期性并不依赖场的统计分布和强度而是依赖于原子运动和场模结构参数εp.不论是共振情况还是远离共振情况,在选取合适的参数εp(这种选取在实验上是可能的)时,我们都能得到较长时间的纯态光场.     

从《新概念物理教程：热学》看面向21世纪的热学教学

结合在热学课程教学中试用《新概念物理教程：热学》的体会,就熵的教学、量子概念和量子统计的引入以及统计规律性的教学等问题提出了热学教学内容改革的看法和在课堂教学中的做法。     

Rb87基态超精细塞曼能级跃迁的偏振激发特性

本论述了Rb^87基态超精细塞曼能级光泵磁共振的偏振激发特性,给出了塞曼能级跃迁谱线随抽运光偏振特性的变化。     

亚波长周期性各向异性金属薄膜的等离子体共振特性

 基于各向异性模型,运用全矢量的3维时域有限差分法（FDTD）,研究了在外磁场作用下,亚波长周期性各向异性金属薄膜的表面等离子体共振机制和特性,即由周期性穿孔形成的局域波导共振和由周期性结构引起的光子晶体共振效应。研究发现:当薄膜厚度一定时,两种等离子体共振模式都会随着外磁场的增大而向短波方向移动;而当外磁场一定、薄膜变厚时,周期结构因素引起的共振传输峰向长波方向转移,波导共振传输峰向短波方向转移;通过调控外加磁场的大小或方向可控制光通过金属薄膜的增强传输效应。     

Au激光等离子体X射线发射光谱的理论研究

采用细致组态(detailed configuration accounting,DCA)方法和碰撞辐射模型(collisional radiative equilibriummodel),Cowan的相对论的原子结构理论程序,选取与初、末离子组态有关的平均组态,取Hartree-Fock-Slater自洽势,考虑了非局域热动力学平衡条件下等离子体的主要原子动力学过程,建立了描述等离子体中碰撞辐射模型的离子布居和能级布居的速率方程,得到了Au元素的离子分布和能级分布,电荷态分布和平均电离度,并模拟出Au激光等离子体的5f-3d跃迁的X射线发射光谱的谱线强度,计算得出的谱线强度与实验数据相比符合得较好.     

原子-场强度相关耦合时原子质心平移运动与内态布居的关系

基于原子与腔场共振相互作用及原子-场缀饰态,讨论了驻波腔场中两能级原子与场耦合强度相关时的原子质心的量子化平移运动对原子内态布居间的相互影响。结果表明原子平移运动敏感地依赖于原子的内态布居。特别地,当原子处于两内态等权重同位相迭加态时,平移运动呈现出很稳定的特征。     

Scheme for implementing perfect quantum teleportation with four-qubit entangled states in cavity quantum electrodynamics

Recently, Peng et al. [2010 Eur. Phys. J. D 58 403] proposed to teleport an arbitrary two-qubit state with a family of four-qubit entangled states, which simultaneously include the tensor product of two Bell states, linear cluster state and Dicke-class state. This paper proposes to implement their scheme in cavity quantum electrodynamics and then presents a new family of four-qubit entangled state |Ω₄>₁₂₃₄. It simultaneously includes all the well-known four-qubit entangled states which can be used to teleport an arbitrary two-qubit state. The distinct advantage of the scheme is that it only needs a single setup to prepare the whole family of four-qubit entangled states, which will be very convenient for experimental realization. After discussing the experimental condition in detail, we show the scheme may be feasible based on present technology in cavity quantum electrodynamics.     

Scheme for implementing perfect quantum teleportatior with four-qubit entangled states in cavity quantum electrodynamics

Recently, Peng et al. [2010 Eur. Phys. J. D 58 403] proposed to teleport an arbitrary two-qubit state with a family of four-qubit entangled states, which simultaneously include the tensor product of two Bell states, linear cluster state and Dicke-class state. This paper proposes to implement their scheme in cavity quantum electrodynamics and then presents a new family of four-qubit entangled state ｜Ω/1234. It simultaneously includes all the well-known four-qubit entangled states which can be used to teleport an arbitrary two-qubit state. The distinct advantage of the scheme is that it only needs a single setup to prepare the whole family of four-qubit entangled states, which will be very convenient for experimental realization. After discussing the experimental condition in detail, we show the scheme may be feasible based on present technology in cavity quantum electrodynamics.