Engineering quantum wave-packet dispersion with a strong nonresonant femtosecond laser pulse

TL;DR

This paper introduces a universal method to control quantum wave-packet dispersion using strong non-resonant femtosecond laser pulses, verified by numerical simulations showing the stopping of wave-packet dispersion.

Contribution

It presents a novel approach for manipulating quantum wave packets via programmable time shifts induced by intense laser pulses.

Findings

Numerical simulations confirm wave-packet dispersion can be halted.

The method is applicable to systems with anharmonic potentials.

Control of wave-packet dynamics is achieved through laser-induced time shifts.

Abstract

A non-dispersing wave packet has been attracting much interest from various scientific and technological viewpoints. However, most quantum systems are accompanied by anharmonicity, so that retardation of quantum wave-packet dispersion is limited to very few examples only under specific conditions and targets. Here we demonstrate a conceptually new and universal method to retard or advance the dispersion of a quantum wave packet through 'programmable time shift' induced by a strong non-resonant femtosecond laser pulse. A numerical simulation has verified that a train of such retardation pulses stops wave-packet dispersion.