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Fotoassociação caótica no oscilador de Morse

Authors: Figueira, Larissa de Oliveira;

Fotoassociação caótica no oscilador de Morse

Abstract

Na presente dissertação investigamos a fotoassociação de moléculas diatômicas com pulsos de laser sob o ponto de vista da mecânica clássica, onde esta consiste na formação de moléculas a partir de átomos em colisão pela interação com campos externos. Esse sistema é modelado pelo oscilador de Morse forçado que apresenta dinâmica caótica. Resolvemos as equações clássicas de movimento e definimos uma probabilidade de fotoassociação que permite fazer comparações com resultados quânticos. Dessa forma investigamos o comportamento caótico da dinâmica da formação de moléculas com laser e analisamos os pulsos adequados para a fotoassociação através da aplicação de algumas técnicas de controle, que incluem pulsos com forma pré - determinada e pulsos obtidos com uma técnica de controle local. Encontramos que pulsos com duas frequências modulada são igualmente capazes de promover a formação de uma quantidade relevante de moléculas a partir de átomos livres

In this work we investigate the laser-pulse photoassociation of diatomic molecules laser from the point of view of classical mechanics, the photoassociation consists of the formation of diatomic molecule from a pair of colliding atoms by the action of external fields. This system is modeled by the driven Morse oscillator. We solve the classical equations of motion and we define a probability of photoassociation we define a photoassociation probability allowing comparisons with quantum results. Thus we investigated the chaotic behavior of the dynamics of formation of molecules with laser and analyze appropriate schemes for photoassociation by applying certain control techniques, which include pulse of pre-defined shape as well as control pulses locally determined

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Pós-graduação em Física - IGCE

Country
Brazil
Keywords

Oscilações, Mecanica, Dinâmica, Moleculas, Comportamento caótico nos sistemas, Dynamics

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green