strong coupling
Physics term referring to a regime where the interaction strength between particles or fields is large, often contrasted with weak coupling. Used in contexts such as quantum field theory, condensed matter, and particle physics.
Perturbation theory cannot be used in the strong coupling regime.
This material exhibits strong coupling between electrons and phonons.
Compound of 強 (strong) and 結合 (coupling, combination). A straightforward technical term formed from standard Sino-Japanese morphemes.