Eigenvector Expansion and Petermann Factor for Ohmically Damped Oscillators

Alec Maassen van den Brink, K. Young, M. H. Yung

Correlation functions $C(t)\sim <\varphi (t)\varphi (0)>$ in ohmically damped systems such as coupled harmonic oscillators or optical resonators can be expressed as a single sum over modes $j$…