Energy Transfer Controlled by Dynamical Stark Shift in Two-level Dissipative Systems

TL;DR

This paper explores how a strong electromagnetic field influences energy transfer in a dissipative two-level electron system through dynamical Stark shift and vibronic coupling, enabling control over phonon reservoir heating or cooling.

Contribution

It introduces a mechanism where dressed electron states interact with reservoir vibrations, allowing electromagnetic pulse parameters to control energy transfer in dissipative systems.

Findings

Energy transfer can be controlled via electromagnetic pulse parameters.

Dressed states involve both electron-photon and electron-vibrational interactions.

Mechanism enables cooling or heating of the phonon reservoir.

Abstract

A strong electromagnetic field interacting with an electron system generates both the Rabi oscillations and the Stark splitting of the electron density. Changing of the electron density gives rise to nonadiabatic effects due to existence of the electron-vibrational interaction in a dissipative system. In this Letter, the mechanism of energy transfer between the electron system and the phonon reservoir is presented. This mechanism is based on establishment of the coupling between the electron states dressed by the electromagnetic field and the forced vibrations of reservoir oscillators under the action of rapid changing of the electron density with the Rabi frequency. The photoinduced vibronic coupling results in appearance of the states that are doubly dressed by interaction, first time due to the electron-photon interaction, and second time due to the electron-vibrational interaction. Moreover, this coupling opens the way to control energy which can be transferred to (heating) or removed from (cooling) the phonon reservoir depending on the parameters of the electromagnetic pulse.