Intramolecular vibrational energy redistribution and the quantum ergodicity transition: a phase space perspective

S Karmakar, S Keshavamurthy - Physical Chemistry Chemical Physics, 2020 - pubs.rsc.org
Intramolecular vibrational energy redistribution (IVR) impacts the dynamics of reactions in a
profound way. Theoretical and experimental studies are increasingly indicating that …

[HTML][HTML] Partial barriers to chaotic transport in 4D symplectic maps

M Firmbach, A Bäcker, R Ketzmerick - Chaos: An Interdisciplinary …, 2023 - pubs.aip.org
Chaotic transport in Hamiltonian systems is often restricted due to the presence of partial
barriers, leading to a limited flux between different regions in phase space. Typically, the …

Dynamical Tunneling in More than Two Degrees of Freedom

S Keshavamurthy - Entropy, 2024 - mdpi.com
Recent progress towards understanding the mechanism of dynamical tunneling in
Hamiltonian systems with three or more degrees of freedom (DoF) is reviewed. In contrast to …

Collision induced dissociation of deprotonated isoxazole and 3-methyl isoxazole via direct chemical dynamics simulations

H Priya, M Paranjothy - Journal of the American Society for Mass …, 2023 - ACS Publications
Isoxazoles are an important class of organic compounds widely employed in synthesis and
drug design. Fragmentation chemistry of the parent isoxazole molecule and its substituents …

Scaling perspective on intramolecular vibrational energy flow: analogies, insights, and challenges

S Keshavamurthy - Adv. Chem. Phys, 2013 - Wiley Online Library
This is a study, certainly not the first one, about the phenomenon of intramolecular
vibrational energy redistribution (IVR)—its mechanism and impact on the reaction rate …

The adiabatic approximation as a diagnostic tool for torsion–vibration dynamics

DS Perry - Journal of Molecular Spectroscopy, 2009 - Elsevier
The adiabatic separation of large-amplitude torsional motion from small-amplitude vibrations
is applied as an aid in interpreting the results of fully coupled quantum calculations on a …

Models for Intrinsic Non-RRKM Dynamics. Decomposition of the SN2 Intermediate Cl–CH3Br

M Paranjothy, R Sun, A Kumar Paul… - … für Physikalische Chemie, 2013 - degruyter.com
Chemical dynamics simulations, based on both an analytic potential energy surface (PES)
and direct dynamics, were used to investigate the intrinsic non-RRKM dynamics of the Cl …

Controlling dynamical localization by waveform reshaping

R Chacón, F Borondo, D Farrelly - Europhysics Letters, 2009 - iopscience.iop.org
We show that reliable control of dynamical localization (DL) in the context of generic
Hamiltonians subjected to periodic fields can be achieved by solely reshaping the field …