Theoretical study of cold and ultracold collisions in triatomic systems using inner-region nuclear motion wavefunctions and outer-region R-matrix propagation

Informations projet

Rmat3

N° de convention de subvention: 701962

DOI

10.3030/701962

Projet clôturé le 27 Juin 2018

Date de signature de la CE 4 Avril 2016

Date de début 1 Juillet 2016

Date de fin 30 Juin 2018

Financé au titre de

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coût total

€ 195 454,80

Contribution de l’UE

€ 195 454,80

Coordonné par

UNIVERSITY COLLEGE LONDON
United Kingdom

Periodic Reporting for period 1 - Rmat3 (Theoretical study of cold and ultracold collisions in triatomic systems using inner-region nuclear motion wavefunctions and outer-region R-matrix propagation)

Période du rapport: 2016-07-01 au 2018-06-30

Résumé du contexte et des objectifs généraux du projet

The problem being addressed in this proposal is the lack of computational tools available to model the collisions of ultracold atoms and diatomics which strongly interact. These collisions are intrinsically quantum mechanical; slight changes in the speed of the collision can cause radically different results. This research is extremely timely as it ties in with current research within the experimental physics community. The overall objective of this project is to combine progress in computationally modelling spectroscopy of triatomic systems with approaches to model electrons colliding with molecular systems. Substantial progress has been made towards developing this new computational methodology, including addressing various unexpected theoretical challenges.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

The theoretical underpinnings of the proposed algorithm design were developed extensively, with complete implementations in the diatomic case and initial implementation in the more complex triatomic case. The treatment of a finite region Schrodinger equation proved much more difficult than anticipated; in particular, the boundary conditions required was unexpected, but yielded great insight into the heavily utilised R-matrix technique. We found a solid choice of basis set for this problem, implemented it within the DVR3D program and achieved promising results for model systems and HOCl. Two publications have so far resulted, with additional publications in preparation. Further, this work was presented at international conferences.

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

This project provides a novel computational approach to the field of ultracold molecular physics, which will enable scientists to elucidate the unusual reactions that occur in this quantum dominated regime.

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