Action Functional for a Particle with Damping
arXiv:1909.03694 · doi:10.3390/condmat4030081
Abstract
In this brief report we discuss the action functional of a particle with damping, showing that it can be obtained from the dissipative equation of motion through a modification which makes the new dissipative equation invariant for time reversal symmetry. This action functional is exactly the effective action of Caldeira-Leggett model but, in our approach, it is derived without the assumption that the particle is weakly coupled to a bath of infinite harmonic oscillators.
Review article, accepted for publication in the special issue "Many Body Quantum Chaos" of Condensed Matter
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