  We propose a framework for Quantum Field Theory (QFT) studies that allows us
to represent field excitations as quantum channels. We demonstrate
inner-workings of the proposed scheme for two universal states: the regularized
vacuum state of a one dimensional QFT system and the lattice-regulated
Thermofield Double State of two identical free QFTs. We investigate actions of
unitary and non-unitary Bosonic Gaussian channels (including Petz Recovery
maps). To evaluate and quantify the character of the channel static action and
channel induced dynamics we calculate quantum entropies and fidelities.
