Physics:Quantum kinetic theory
Kinetic theory describes the behavior of systems with a large number of particles by introducing a statistical description in terms of a distribution function in phase space. It forms a bridge between microscopic particle dynamics and macroscopic physical properties such as density, temperature, and pressure.
Kinetic theory is central to the description of gases, plasmas, and many-body systems, and provides the foundation for transport theory and fluid models. It forms the basis for equations such as the Vlasov equation and macroscopic models including magnetohydrodynamics.
Distribution function
The fundamental object of kinetic theory is the distribution function:
Macroscopic quantities are obtained as moments:
- Density:
- Mean velocity:
Evolution equations
The distribution evolves according to equations such as the Vlasov equation.
Applications
Kinetic theory is used in:
It underlies transport theory and phenomena described by drift physics.
See also
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