Theoretical and quantum mechanical deconstruction of vibrational energy transfer pathways modified by collective vibrational strong coupling Nature Communications Unveiling Vibrational Couplings in Model Peptides in Solution by a Theoretical Approach COUPLING TYPES 4 1 Definition Couplings are mechanical components used to connect two rotating shafts for transmitting power and torque. They are designed to compensate for misalignment, absorb vibration, and reduce shock Rotationalvibrational coupling Wikipedia