Lagrangian descriptor and escape time as tools to investigate the dynamics of laser-driven polar molecules

Página do item simplificado
dc.contributor.authorForlevesi, M. D. [UNESP]
dc.contributor.authorEgydio De Carvalho, R. [UNESP]
dc.contributor.authorDe Lima, Emanuel F.
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2023-07-29T13:42:20Z
dc.date.available2023-07-29T13:42:20Z
dc.date.issued2023-02-01
dc.description.abstractWe consider the nonlinear dynamics of a diatomic polar molecule under a linearly polarized laser field. We assume a model in which the molecule dipole is coupled with a time-dependent electric field. This system presents a bound energy region where the atoms are bound, and a free-energy region where the atoms are dissociated. Due to the nonalignment between the dipole axis and the laser direction, and the time dependence of the external field, this system presents two and a half degrees of freedom, namely the vibrational degree, the rotation degree, and the time. To investigate the system dynamics, instead of using the Poincaré surface-of-section technique, we propose the use of the Lagrangian descriptor associated with the escape times. The Lagrangian descriptor is a quantity that reveals complex structures in the phase space, whereas the escape times are the time span in which a trajectory is initially in the bound region before escaping to the unbound region. The combination of these two quantities allows us to distinguish between real stability regions from other complex structures, including stickiness regions, and a different formation, which we call escape islands. With the help of these tools, we find that for high-field amplitudes the inclusion of rotation leads to an increase of the stability regions, which implies a decrease of the dissociation in comparison with the one-dimensional case.en
dc.description.affiliationUniversidade Estadual Paulista-UNESP Instituto de Geociências e Ciências Exatas-IGCE Departamento de Estatística Matemática Aplicada e Ciências da Computação, SP
dc.description.affiliationDepartamento de Física Universidade Federal de São Carlos, SP
dc.description.affiliationUnespUniversidade Estadual Paulista-UNESP Instituto de Geociências e Ciências Exatas-IGCE Departamento de Estatística Matemática Aplicada e Ciências da Computação, SP
dc.identifierhttp://dx.doi.org/10.1103/PhysRevE.107.024209
dc.identifier.citationPhysical Review E, v. 107, n. 2, 2023.
dc.identifier.doi10.1103/PhysRevE.107.024209
dc.identifier.issn2470-0053
dc.identifier.issn2470-0045
dc.identifier.scopus2-s2.0-85148333437
dc.identifier.urihttp://hdl.handle.net/11449/248378
dc.language.isoeng
dc.relation.ispartofPhysical Review E
dc.sourceScopus
dc.titleLagrangian descriptor and escape time as tools to investigate the dynamics of laser-driven polar moleculesen
dc.typeArtigo
unesp.author.orcid0000-0001-6944-0037[1]
unesp.author.orcid0000-0002-2684-5058[2]
unesp.author.orcid0000-0003-0354-9181[3]

Arquivos

Coleções

Artigos - Estatistica, Matemática Aplicada e Computação - IGCE