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Stabilization and relative phase effects in a dichromatically driven diatomic Morse molecule: Interpretation based on nonlinear classical dynamics

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dc.contributor.author Constantoudis, V en
dc.contributor.author Nicolaides, CA en
dc.date.accessioned 2014-03-01T01:23:06Z
dc.date.available 2014-03-01T01:23:06Z
dc.date.issued 2005 en
dc.identifier.issn 0021-9606 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/16819
dc.subject.classification Physics, Atomic, Molecular & Chemical en
dc.subject.other Dissociation dynamics en
dc.subject.other Morse molecules en
dc.subject.other Phase space topology en
dc.subject.other Undriven systems en
dc.subject.other Chemical bonds en
dc.subject.other Dissociation en
dc.subject.other Ground state en
dc.subject.other Hamiltonians en
dc.subject.other Laser pulses en
dc.subject.other Probability en
dc.subject.other Quantum theory en
dc.subject.other Topology en
dc.subject.other Molecular dynamics en
dc.title Stabilization and relative phase effects in a dichromatically driven diatomic Morse molecule: Interpretation based on nonlinear classical dynamics en
heal.type journalArticle en
heal.identifier.primary 10.1063/1.1854631 en
heal.identifier.secondary http://dx.doi.org/10.1063/1.1854631 en
heal.identifier.secondary 084118 en
heal.language English en
heal.publicationDate 2005 en
heal.abstract The dissociation dynamics of a dichromatically laser-driven diatomic Morse molecule vibrating in the ground state is investigated by applying tools of the nonlinear theory of classical Hamiltonian systems. Emphasis is placed on the role of the relative phase of the two fields, phi. First, it is found that, just like in quantum mechanics, there is dependence of the dissociation probability on phi. Then, it is demonstrated that addition of the second laser leads to suppression of probability (stabilization), when the intensity of the first laser is kept constant just above or below the single laser dissociation threshold. This "chemical bond hardening" diminishes as phi increases. These effects are investigated and interpreted in terms of modifications in phase space topology. Variations of phi as well as of the intensity of the second laser may cause (i) appearance/disappearance of the stability island corresponding to the common resonance with the lowest energy and (ii) deformation and movement of the region of Kolmogorov-Arnold-Moser tori that survive from the undriven system. The latter is the main origin in phase space of stabilization and phi dependence. Finally, it is shown that the use of short laser pulses enhances both effects. (C) 2005 American Institute of Physics. en
heal.publisher AMER INST PHYSICS en
heal.journalName Journal of Chemical Physics en
dc.identifier.doi 10.1063/1.1854631 en
dc.identifier.isi ISI:000227372200021 en
dc.identifier.volume 122 en
dc.identifier.issue 8 en


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