[Estimates on the molecular dynamics for the predissociation process]
We study the survival amplitude associated with a semiclassical matrix Schrödinger operator that models the predissociation of a general molecule in the Born–Oppenheimer approximation. We show that it is given by its usual time-dependent exponential contribution, up to a reminder term that is small relative to the semiclassical parameter, and for which we find the main contribution. The result applies in any dimension, and in the presence of a number of resonances that may tend to infinity as the semiclassical parameter tends to 0.
On étudie l'amplitude de survie associée à un opérateur de Schrödinger matriciel représentant la prédissociation d'une molécule arbitraire dans l'approximation de Born–Oppenheimer. On montre que celle-ci est donnée par l'habituelle contribution exponentielle, modulo un reste qui est petit par rapport au paramètre semiclassique, et dont la contribution principale est explicite. Ce résultat s'applique en dimension quelconque, et il est possible d'y prendre en compte un nombre de résonances tendant vers l'infini lorsque le paramètre semiclassique tend vers zéro.
Accepted:
Published online:
Philippe Briet 1, 2; André Martinez 3
@article{CRMATH_2016__354_9_912_0, author = {Philippe Briet and Andr\'e Martinez}, title = {Dynamique mol\'eculaire de la pr\'edissociation}, journal = {Comptes Rendus. Math\'ematique}, pages = {912--915}, publisher = {Elsevier}, volume = {354}, number = {9}, year = {2016}, doi = {10.1016/j.crma.2016.06.003}, language = {fr}, }
Philippe Briet; André Martinez. Dynamique moléculaire de la prédissociation. Comptes Rendus. Mathématique, Volume 354 (2016) no. 9, pp. 912-915. doi : 10.1016/j.crma.2016.06.003. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2016.06.003/
[1] Estimates on the molecular dynamics for the predissociation process, 2015 (Preprint) | arXiv
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