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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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National Technical University of Athens   

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Digital Library of National Technical University of Athens | Dspace@NTUA   

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Stabilization and relative phase effects in a dichromatically driven diatomic Morse molecule: Interpretation based on nonlinear classical dynamics (EN)
Constantoudis, V (EN)
Nicolaides, CA (EN)
journalArticle (EN)
2014-03-01T01:23:06Z
2005 (EN)
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)
Physics, Atomic, Molecular & Chemical (EN)
Probability (EN)
Molecular dynamics (EN)
Ground state (EN)
Topology (EN)
Morse molecules (EN)
Phase space topology (EN)
Undriven systems (EN)
Hamiltonians (EN)
Chemical bonds (EN)
Dissociation dynamics (EN)
Dissociation (EN)
Laser pulses (EN)
Quantum theory (EN)
Journal of Chemical Physics (EN)
Αγγλική γλώσσα
AMER INST PHYSICS (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
Ιδρυματικό Αποθετήριο
Δημοσιεύσεις μελών Δ.Ε.Π. σε περιοδικά



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