resonancesfrom

Resonancesfrom is a neologism used in some theoretical discussions to describe the phenomenon whereby resonant features originate in one part of a coupled system and are observed in another, due to the mediation of a coupling channel. The term emphasizes the source of the resonance rather than the intrinsic modes of the receiver. In practice, resonancesfrom refers to transfer of resonant response through interactions such as mechanical coupling, optical mediation, or electronic feedback, so that a target subsystem exhibits enhanced response at frequencies matching resonances of a separate source subsystem.

In mathematical terms, resonancesfrom can be analyzed with linear response theory and transfer functions; if the coupling is linear and weak, the poles of the receiver's transfer function include contributions from the source's resonant poles, resulting in spectral lines at those frequencies. In nonlinear or strongly coupled systems, the phenomenon can produce hybridized modes or interference patterns, making attribution to a single source difficult. Examples include coupled resonator optical waveguides where a signal's resonance originates in a pump cavity, and mechanical systems where a driving oscillator imprints its resonant frequencies onto a neighboring structure.

Usage and interpretation: The term remains informal and is not widely standardized; it is often discussed alongside resonance transfer, mediated coupling, or mode hybridization. Researchers advise careful experimental design to distinguish resonancesfrom from intrinsic resonances.