2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93896We present results of numerical investigation of a microscopic dynamics of a two-level atom embedded into a ``linear crystal'' of other two-level atoms. These additional atoms play a role of a material media. All atoms interact with a multimode cavity field. We study how the decay of the initially excited atom is affected by the presence of material media and spectral properties of the cavity field.13 pages, revtex, 10 figuresQuantum Physicstext