The object constructed

The construction follows \[

autonomous Hamiltonian and preparation complete source–field isometry
prescribed packet collection recovery, residual, and implementation certificates.

The field channel is derived from the stated dynamics. It is not selected by occupation-spectrum agreement.

The one-excitation operator belongs to the Friedrichs family Friedrichs,FacchiLigaboLonigro,Lonigro. No new Friedrichs-model class or erasure-channel mechanism is claimed Erasure. The contribution is a complete Hamiltonian-to-channel application with an explicit positive-energy example, finite-packet estimates, identified output embeddings, and arbitrary-reference recovery constants.

The ideal source–field evolution is autonomous: its Hamiltonian is time independent. This does not make preparation, collection, or decoding autonomous laboratory operations.