Directed excitation transfer in vibrating chains by external fields

TL;DR

This paper investigates how external fields can induce directed excitation transfer in vibrating chains, demonstrating controllable transport of wave packets through resonance with chain oscillations.

Contribution

It introduces a method to achieve directed excitation transfer in vibrating chains by matching external field strength with chain oscillation frequencies, considering different vibrational modes.

Findings

External fields enable controlled excitation transport in vibrating chains.

Matching field strength with oscillation frequency induces directed wave packet movement.

Both uniform and eigenmode oscillations can produce transport.

Abstract

We study the coherent dynamics of excitations on vibrating chains. By applying an external field and matching the field strength with the oscillation frequency of the chain it is possible to obtain an (average) transport of an initial Gaussian wave packet. We distinguish between a uniform oscillation of all nodes of the chain and the chain being in its lowest eigenmode. Both cases can lead to directed transport.