Colored noise: A perspective from a path-integral formalism

Abstract
A stationary distribution for Langevin equations driven by colored noise is obtained, in the weak-noise limit, from the configuration-space Lagrangian-like function. The derivation makes no explicit use of Markovian, Fokker-Planck, or small-correlation-time approximations. Markovian approximations based on the Lagrangian, which do not involve truncated expansions, are also discussed.