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

Constantoudis, V; Nicolaides, CA

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