Related Experiment Video
Updated: Aug 14, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
Quasiresonance: switching internal energy transfer on and off
1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Abstract:
Quasiresonance involves a slow "external" switching on and off of an interaction between internal degrees of 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 enough to have conserved actions. The interaction either can be imposed externally as a time dependent coupling or can arise autonomously due to interactions with other degrees of freedom. A resonance transformation into slow and fast angles reveals the action corresponding to the fast angle is adiabatic and conserved to very high accuracy. This paper extends our work on quasiresonance to new systems and regimes, including the He-H2 system, collisions with a periodic lattice, perturbative interactions, and discussion of quasiresonance in higher dimensional systems.
Related Concept Videos
Resonance in an AC Circuit
Switching of BJT
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are reverse-biased. The...
Resonance and Hybrid Structures
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Oscillations In An LC Circuit
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Series Resonance
