Speaker
Bjoern Walk
(Institut für Kernphysik, Universität Mainz)
Description
To describe a decay like $K \to \pi\pi$ a formulation of lattice QCD has to be found which respects chiral symmetry. For this, the Dirac operator has to fulfill the Ginsparg-Wilson relation and one particular solution to this is the Neuberger overlap operator. The downside of having a chiral formulation of QCD on the lattice is that its computational costs are orders of magnitudes higher.
On the other hand, recent development has shown that a lot of computing power can be gained from GPU hardware.
I intend to give a review of our implementation of the Neuberger overlap
operator on the GPU and give an outlook of the applications we like to aim. Topics covered include the calculation of exceptional low-modes to the Wilson-Dirac operator and the exact treatment, computation of the index of the Neuberger overlap operator and the zero-mode expansion of the propagator.
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Primary author
Bjoern Walk
(Institut für Kernphysik, Universität Mainz)
