New approach for analysing the master equation with a damped harmonic oscillator and squeezed bath

We solve the master equation with a damped harmonic oscillator and squeezed bath to obtain density operators’ infinite operator–sum representation via a new approach, i.e., by virtue of the new thermo-entangled state representation that has a fictitious mode as a counterpart mode of the system mode. The corresponding Kraus operators from the point of view of quantum channel are also derived.