Open AccessHolstein polaron at fixed temperature: influence of the chain length
Author(s) -
Н. С. Фиалко,
M.M. Olshevets,
В. Д. Лахно
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2155/1/012033
Subject(s) - polaron , thermostat , semiclassical physics , langevin dynamics , chain (unit) , trapping , physics , statistical physics , quantum , particle (ecology) , molecular dynamics , condensed matter physics , quantum mechanics , thermodynamics , ecology , oceanography , biology , geology , electron
Based on the semiclassical Holstein model, the dynamics of a quantum particle in one-dimensional molecular chain with a trapping site is modeled. Numerical simulation is used to investigate the dynamics of a polaron in a chain with small random Langevin-like perturbations which imitate the thermostat. Parameter values are chosen such that the polaron energy at the trapping site is much greater than the energy of temperature fluctuations. Results of modeling demonstrate that temperature decay of a polaron depends on the chain length even at very low temperatures.