Kinetic Theory
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چکیده
Kinetic theory is the simplest approach that describes the dynamics of enormous numbers of particles. Often it is the only one where we can make progress in actually calculating numbers such as viscosity or electrical conductivity! It describes nearly ideal gases: usually the interactions are only taken into account in the collisions (to be defined below) that lead to the approach to equilibrium, and not in the properties of that equilibrium (such as the equation of state, compressibility etc.). In some cases (e.g. Fermi liquid theory) it is useful to take other effects of the interactions into account in a mean field sort of way.
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