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Updated: Aug 9, 2026

Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional π-conjugate Systems
Published on: February 10, 2020
Vibrational excitons in alpha-helical polypeptides: multiexciton self-trapping and related infrared transient
Dmitry V Tsivlin1, Hans-Dieter Meyer, Volkhard May
1Institut für Physik, Humboldt-Universität zu Berlin, D-12489 Berlin, Federal Republic of Germany. tsivlin@physik.hu-berlin.de
Abstract:
Based on the multiexciton expansion of a model Hamiltonian, an accurate quantum-dynamical description of vibrational states formed by amide modes in alpha-helical polypeptides is presented. Using the multiconfiguration time-dependent Hartree method, linear and pump-probe infrared absorption spectra are calculated by numerical time propagation of the exciton-chain vibrational wave function. The formation of self-trapped exciton states is discussed within the approximation of adiabatic excitons and within the full quantum description.
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