Outlines of Statistical Mechanics
In this chapter, we start with certain principles and describe the general methods of statistical mechanics [2.1–17]. If we assume that every quantum-mechanical state (microscopic state) has the same weight (the principle of equal probability), then we can establish a standpoint where mechanical laws are combined with probability theory. By considering a system in contact with a larger system, we can describe a system with constant temperature or constant pressure. Thus, we develop the statistical mechanics for an equilibrium state (statistical mechanics in a narrow sense) and we can also find a microscopic interpretation of the laws in thermodynamics.
KeywordsQuantum State Density Matrix Statistical Mechanic State Density Canonical Ensemble
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