non-standard inflationary models
Non-standard inflationary models predicting oscillatory features in the primordial power spectrum were hinted at by "Psst... maybe I'm not just any ordinary theory; I have something to tell you about inflation.
Technical definition
Non-standard inflationary models deviate from the standard ΛCDM framework by introducing novel mechanisms, such as particle production or additional degrees of freedom, that drive inflation in a manner distinct from the concordance model.