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Intramolecular vibrational energy redistribution as state space diffusion: classical-quantum correspondence
Aravindan Semparithi1, Srihari Keshavamurthy
1Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India.
We investigated intramolecular vibrational energy redistribution (IVR) in CDBrClF. An edge state showed a larger effective IVR dimension than an interior state due to inhomogeneous phase space.
Area of Science:
- Chemical Physics
- Molecular Dynamics
- Spectroscopy
Background:
- Intramolecular vibrational energy redistribution (IVR) is crucial for understanding energy flow in molecules.
- Studying IVR dynamics provides insights into molecular stability and reactivity.
- Effective spectroscopic Hamiltonians are used to model complex molecular vibrations.
Purpose of the Study:
- To investigate the intramolecular vibrational energy redistribution (IVR) dynamics of CDBrClF.
- To compare IVR from nearly isoenergetic zeroth-order states: an edge (overtone) and an interior (combination) state.
- To analyze the influence of phase space structure on IVR dynamics.
Main Methods:
- Utilized an effective spectroscopic Hamiltonian for four coupled high-frequency modes of CDBrClF.
- Employed a state space diffusion perspective to study IVR dynamics.
- Applied wavelet-based time-frequency analysis to characterize phase space properties.
Main Results:
- Identified an inhomogeneous phase space in CDBrClF due to the trapping of classical trajectories.
- Observed that the interior state exhibits a smaller effective IVR dimension compared to the edge state.
- Demonstrated a correlation between phase space inhomogeneity and IVR dynamics.
Conclusions:
- The structure of phase space significantly impacts IVR dynamics.
- Edge states may undergo more efficient energy redistribution than interior states in certain molecular systems.
- State space diffusion analysis is a valuable tool for understanding molecular energy flow.
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