三能级原子与双模场多光子相互作用的量子动力学性质

研究三能级原子与双模场多光子相互作用过程中,原子能级占据几率的量子动力学行为。显然,本文的结果与单光子跃迁过程中的结果完全不同。     

FORMATING DOUBLE LAYER MECHANISM BY ELECTRIC CHARGED PARTICLE STREAM IN PLASMA

In this paper, two-fluid equations have been solved after having considered magnetic field generated by charged particle stream. Finally, the distribution of electric field E_z(z,r) and its growth rate γ in plasma have been obtained. From the expression of E_z(z,r) it can be known that the double layer has been formed. With the increase of disturbance γ will be larger, and finally this will result in the interruption of electric current and occurrence of burst.     

费曼没有错

贵刊1984年第16期上有一篇题为《一道”通量法则”例外的例题的讨论》的文章(作者黄忠民)认为:费曼对图一(请参阅该文的图一;下面用到的图二亦同)的讨论的结论不妥. 费曼认为,在图一装置的实验中,如对变化着的闭合回路,应用“通量法则”即法拉第定律来考虑,应得出电动势　很大的结论.但由于两金属板(注意,板的边缘稍为弯曲)的转动可由微小的运动来完成,因而。u×B很小,实际上不会产生电动势.由此,费曼指出“通量法则”在此已不适用了.然而,黄的文章认为“通量法则”对图一的实验仍然完全适用. 实际上,费曼并没有错.其原因在于费曼在这里提…