Göttingen 2012 – scientific programme
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T: Fachverband Teilchenphysik
T 23: Gittereichtheorie
T 23.1: Talk
Thursday, March 1, 2012, 16:45–17:00, VG 3.101
Correlation functions of atomic nuclei in Lattice QCD — Zoltán Fodor1,2,3, •Jana Günther1, Balint Toth1, and Lukas Varnhorst1 — 1Department of Physics, Bergische Universität Wuppertal, D-42119 Wuppertal, Germany — 2Institute for Theoretical Physics, Eötvös University, H-1117 Budapest, Hungary — 3Jülich Supercomputing Centre, Forschungszentrum Jülich, D-52425 Jülich, Germany
To determine the mass of the atomic nuclei in lattice QCD one has to calculate the correlation function of suitable combinations of quark field operators. However the calculation of this correlation functions requires to evaluate a large number of Wick contractions which scales as the factorial of the number of nucleons in the system. We explore the possibilities to reduce the computational effort for such evaluations by exploiting certain symmetries of the systems. We discuss a recursive approach which respects these symmetries and may allow the determination of the correlation function in significantly less computer time.