| Abstract
| - Quasiresonance involves a slow “external” switching on and off of an interaction between internal degreesof freedom described by action-angle variables having approximate resonances. The resonances or near-resonances spawn slow coordinates that fail to be adiabatic, but the remaining coordinates may be fast enoughto have conserved actions. The interaction either can be imposed externally as a time dependent coupling orcan arise autonomously due to interactions with other degrees of freedom. A resonance transformation intoslow and fast angles reveals the action corresponding to the fast angle is adiabatic and conserved to very highaccuracy. This paper extends our work on quasiresonance to new systems and regimes, including the He−H2system, collisions with a periodic lattice, perturbative interactions, and discussion of quasiresonance in higherdimensional systems.
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