Français Anglais
Accueil Annuaire Plan du site
Accueil > Evenements > Séminaires
Séminaire d'équipe(s) Parall
Programming models and numerical algorithms for quantum chemistry
Jeff Hamond

08 June 2012, 10h30 - 08 June 2012, 11h30
Salle/Bat : 455/PCRI-N
Contact :

Activités de recherche :

Résumé :
The connections between dense linear algebra and quantum chemistry methods such as Hartree-Fock, Density-Functional Theory and coupled-cluster theory will be explored from the perspective of programming models and numerical algorithms.
In the first part, we describe the well-known massively parallel quantum chemistry code NWChem and its associated programming model and runtime system (Global Arrays) and compare it to more traditional synchronous MPI-based approaches.
The apparent discrepancies between these models have been reconciled, enabling portability and performance of NWChem and Global Arrays on state of the art supercomputers.
In the second part, we consider the algorithms currently used for tensor contractions in quantum chemistry codes and demonstrate a completely new approach that is intimately connected to well-understood fast algorithms for matrix multiplication and parallel sorting.
The challenge of load-imbalance in coupled-cluster codes is completely eliminated in this new approach, which has significant implications for runtime system requirements.

This includes joint work with Jim Dinan (Argonne), Edgar Solomonik (Berkeley) and Devin Matthews (Texas).

Pour en savoir plus :
Séminaires
Resilient PDE solving approaches for exascale comp
Calcul à haute performance
Tuesday 29 May 2018 - 10h30
Salle : 465 - PCRI-N
Paul Mycek .............................................

Binary pattern of length greater than 14 are abeli
Combinatoire
Friday 25 May 2018 - 14h30
Salle : 445 - PCRI-N
Matthieu Rosenfeld .............................................

Collaborative delivery by robots that can share en
Algorithmique distribuée
Wednesday 02 May 2018 - 10h30
Salle : 465 - PCRI-N
Evangelos Bampas .............................................

Mariage stable auto-stabilisant et distribué
Théorie des graphes
Friday 13 April 2018 - 14h30
Salle : 445 - PCRI-N
Marie Laveau .............................................

Modélisation et implémentation du produit de matri
Calcul à haute performance
Wednesday 11 April 2018 - 10h30
Salle : 465 - PCRI-N
Thomas Lambert .............................................