Dynamical fat link fermions

Details Dynamical fat link fermions Dynamical fat link fermions

2004-02-27

arxiv.org/abs/hep-lat/0402036v1

Nucl.Phys.Proc.Suppl.128:96-99,2004

Physics

High Energy Physics

High Energy Physics - Lattice

LHP '03 (Cairns) Proceedings

Scientific paper

10.1016/S0920-5632(03)02464-2

The use of APE smearing or other blocking techniques in fermion actions can provide many advantages. There are many variants of these fat link actions in lattice QCD currently, such as FLIC fermions. Frequently, fat link actions make use of the APE blocking technique in combination with a projection of the blocked links back into the special unitary group. This reunitarisation is often performed using an iterative maximisation of a gauge invariant measure. This technique is not differentiable with respect to the gauge field and thus prevents the use of standard Hybrid Monte Carlo simulation algorithms. The use of an alternative projection technique circumvents this difficulty and allows the simulation of dynamical fat link fermions with standard HMC and its variants.

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