Non-equilibrium dynamics of the Holstein polaron

摘要

Keeping the full quantum nature of the problem we compute the relaxation time of the Holstein polaron in one dimension after it was driven far from the equilibrium by a strong oscillatory pulse. The comparison with linear response theory is made. The inverse relaxation time is for small values of electron-phonon coupling λ linear with λ, while it deviates downwards from the linear regime at λ > 0.1/ω0.