Vibrational ladder-descending photostabilization of a weakly bound molecule: Quantum optimal control with a genetic algorithm

TL;DR

This paper introduces a quantum optimal control method using a genetic algorithm to design infrared laser pulses that efficiently transfer a polar molecule between vibrational levels within the same electronic state.

Contribution

It presents a novel approach combining analytical shaped laser pulses with genetic algorithms for vibrational state control in molecules.

Findings

Successful computational demonstration on KRb molecule

Effective optimization of infrared chirped laser pulses

Potential applications in molecular quantum state manipulation

Abstract

We propose an optical control scheme for driving a polar molecule from a high-lying vibrational level to a target low-lying one, within the same electronic state. The scheme utilizes an infrared chirped laser pulse with an analytical shape, whose parameters are optimized by means of a heuristic formulation of quantum optimal control based on a genetic algorithm. We illustrate this methodology computationally for a KRb Feshbach molecule in the lowest triplet electronic state.