24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

Adaptive Aggregation-based Domain Decomposition Multigrid for Twisted Mass Fermions

27 Jul 2016, 10:00
20m
Building 67 Room 1007 (Highfield Campus, University of Southampton)

Building 67 Room 1007

Highfield Campus, University of Southampton

Talk Algorithms and Machines Algorithms and Machines

Speaker

Mr Simone Bacchio (University of Cyprus - University of Wuppertal)

Description

We extend the Adaptive Aggregation Based Domain Decomposition Multigrid (DD-$\alpha$AMG) algorithm to $N_f=2$ twisted mass fermions. We show numerical results for an $N_f=2$ ensemble of twisted fermions with a clover term simulated at the physical value of the pion mass. We fine-tuned the parameters to achieve a speedup comparable to the one obtained for clover fermions. We also present a complete analysis of the aggregation parameters that provides a novel insight on the multigrid methods for lattice QCD independently of the fermion discretization.

Primary authors

Dr Jacob Finkenrath (The Cyprus Institute) Mr Simone Bacchio (University of Cyprus - University of Wuppertal)

Co-authors

Prof. Andreas Frommer (University of Wuppertal) Prof. Constantia Alexandrou (University of Cyprus - The Cyprus institute) Dr Karsten Kahl (University of Wuppertal) Dr Matthias Rottmann (University of Wuppertal)

Presentation Materials

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