Optical suppression of electron motion in low-dimensional correlated electron system

TL;DR

This paper investigates how an AC electric field suppresses electron motion in a one-dimensional Hubbard model, revealing the roles of Coulomb interaction and electron density, and offering insights for controlling correlated electron behavior.

Contribution

It demonstrates that Coulomb interaction and electron density significantly influence electron motion suppression under AC fields in a 1D Hubbard model, using three calculation methods.

Findings

Suppression magnitude depends on Coulomb interaction and electron density.

Phase and frequency of AC field have minor effects.

Results guide photocontrol of correlated electron motion.

Abstract

Suppression of electron motion under an alternating current (AC) electric field is examined in a one-dimensional Hubbard model. Utilizing three complementary calculation methods, it is found unambiguously that magnitudes of the kinetic-energy suppressions are influenced sensitively by the Coulomb interaction as well as the electron density. The phase and frequency in the AC field do not bring about major effects. The results are interpreted as a combined effect of the Coulomb interaction and the AC field, and provide a guiding principle for the photocontrol of correlated electron motion.