| Nonequilibrium Statistical Mechanics

Nonequilibrium statistical mechanics is a branch of physics that studies systems that are not in thermodynamic equilibrium, such as those with ongoing chemical reactions or flows of particles and heat. It is a more complex field than its equilibrium counterpart because the system's distribution of states is constantly changing over time. This field uses methods like the master equation, Langevin equations, and Fokker-Planck equations to model the speed and behavior of irreversible processes and phenomena like chemical reaction rates, diffusion, and dynamical phase transitions.