经典理论判据及固体物理学中的半经典理论方法

CRITERONS OF APPLIED CLASSICAL THEORY AND SEMICLASSICAL METHODS IN THE SOLID PHYSICS

经典物理学是量子理论的极限形式，在一定条件下，量子效应不显著时，经典、半经典理论要简单得多．本文阐述总结了量子物理学过渡到经典物理学的狄拉克判据、应用经典力学的第一判据和第二判据、应用经典统计的简并温度判据，讨论了固体物理学中的诸多半经典方法。

Classical physics is the limit form of quantum theory. When the quantum effects of objects aren't markedness under the definite condition, it's a good deal simpler to use the methods of the classical, semiclassical theory. In this paper, the Diral Criterion for transition from quantum theory to classical physics, the first and second criterions for applied classical mechanics,and degenerate temperature criterion for classical statistics have been expouded,and the many semiclassical methods in the solid physics have been discussed.