Feynman–Vernon influence functional approach for the damped driven oscillator in RLC circuit

The Feynman–Vernon influence functional formalism which is adequate for the study of dissipative dynamics is used to describe weakly coupled circuits. The classical behavior of the system formed by a resistance, electric and magnetic polarizations is characterized by the influence functional approach whose behavior, although linear in some sense, is not representable by systems of perfect oscillators. In addition, linear combinations of complex q-exponentials are used in representation of nonlinear circuits in which the solution of the correspondent nonlinear differentials equations is mapped in modified differentials equations for a new deformed variable.