# Periodically driven small polarons

## TL;DR

This paper investigates how strong external electric fields influence small lattice polarons, revealing that resonance with ion oscillations can liberate polarons and exponentially increase tunneling frequency.

## Contribution

It introduces a direct time-domain integration of the Schrödinger equation to study polaron dynamics under external fields, highlighting resonance effects.

## Key findings

- Resonance with ion oscillations liberates polarons.
- Tunneling frequency increases exponentially at resonance.
- External fields modulate carrier density and ion motion.

## Abstract

Small lattice polarons driven by strong external electric fields are considered. A time-dependent Schroedinger equation is integrated directly in time domain. The field agitates ions both directly and through modulation of carrier density. It is found that when the field is in resonance with local ion oscillations, the polaron is liberated from its self-induced trap and the tunneling frequency increases exponentially.