So just as electric charge is 'universal' in that all particles have charges that are multiples of e, the weak coupling also appears to be universal.
In high-level terms, this may be summarized as a weak coupling between the network and application layers of the overall system.
The exceptionally high Q-factors of acoustic resonators are linked to their weak coupling to the environment.
It may be that this weak coupling, which is problematic for mechanical applications of nanotubes, is an advantage for thermal applications.
Pekar's macroscopic model of polaron became a field theory without singularities, and was afterwards applied to weak and intermediate electron-phonon coupling.
The hidden states have masses near a GeV and very weak couplings to particles in the Standard Model.
According to the studies of past great earthquakes, a weak seismic coupling is suggested in the offshore Sanriku region.
Note the factors in the weak couplings: these factors project out the left handed components of the spinor fields.
The theory with strong coupling cannot be understood by means of perturbation theory, but the theory with weak coupling can.
Since graphene has extremely weak spin-orbit coupling, it is very unlikely to support a quantum spin Hall state at temperatures achievable with today's technologies.