物理学史上的著名理想实验

"理想实验"对物理学的形成和发展,对物理理论的补充和完善起着重要的作用.在物理教育中运用相关的理想实验,对启迪学生的智慧,培养学生丰富的想象力、创新思维能力、科学抽象能力都具有重要的作用.     

Quantum Confinement of si Nanosphere with Radius Smaller than 1.2 nm

We calculate the density of states, the squared optical matrix element along the x direction, and the band gap of Si nanosphere with radius r smaller than 1.2 nm using the method of linear combination of atomic orbitals. It is shown that the quantum confinement effect of Si nanocrystals exists obviously, fulfilling E = 1.92 0.23/r^1.8,but the band gap exhibits fluctuation with nanocrystal size, which is caused by the dangling bonds of atoms ino uter layers. The obtained result indicates that the surface chemical bonds have larger influence on the energy band structure of Si nanosphere when its radius is smaller than 1.2nm.     

压缩粒子数态中振幅k次幂的压缩效应

研究了在压缩粒子数态（ＳＮＳ）中振幅ｋ次幂的压缩效应（ＡＫＰＳ），导出有关压缩效应的普遍性公式，并用数值计算的方法，得到了前四次幂ｋ＝１，２，３和４的有关压缩特性，结果表明：这种压缩特性在光学通信领域有着一定的应用前景。 关键词：