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Updated: Jul 5, 2025

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
Classically forbidden nonadiabatic transitions in multidimensional chemical dynamics
I-Yun Hsiao1, Yoshiaki Teranishi1, Hiroki Nakamura2
1Institute of Physics, National Yang Ming Chiao Tung University, 1001 Ta Hsueh Rd., Hsinchu, 30010, Taiwan. tera@nycu.edu.tw.
Abstract:
An accurate method is proposed to deal with such nonadiabatic transitions as those energetically inaccessible, namely, classically forbidden transitions. This is formulated by using the corresponding Zhu-Nakamura formulas and finding the optimal paths in the classically forbidden tunneling regions that maximize the overall transition probabilities. This can be done for both the nonadiabatic tunneling type (so-called normal case in electron transfer) in which two diabatic potentials have opposite signs of slopes and the Landau-Zener type (inverted case) in which two diabatic potentials have the same sign of slopes. The method is numerically demonstrated to be useful for clarifying chemical and biological dynamics.
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