Vibron Self--trapped States in Biological Macromolecules: Comparison of Different Theoretical Approaches

TL;DR

This paper compares different theoretical approaches, including the MLF method and small-polaron theory, to study vibron self-trapped states in biological macromolecules, identifying parameter regions where each method performs better.

Contribution

It evaluates the applicability of the MLF variational method versus standard small-polaron theory for modeling vibron self-trapped states in biological chains.

Findings

MLF method provides better energy predictions in certain parameter regions.

Comparison reveals where each theoretical approach is more accurate.

The study enhances understanding of vibron localization in biological systems.

Abstract

A study of the applicability of the variational treatments based on using of the modified Lang-Firsov unitary transformation (MLF method) in the investigation of the vibron self-trapped states in biological macromolecular chains are presented. We compare the values of the ground state energy predicted by MLF methods with the values of the ground state energy predicted by the standard small-polaron theory, for various values of the basic energy parameters of the system. We obtain regions in system parameter space where MLF approach gives better description of the vibron states.