Topological tunneling with Dynamical overlap fermions

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dc.creatorCundy, Nigel
dc.creatorKrieg, Stefan
dc.creatorLippert, Thomas
dc.creatorSchaefer, Andreas
dc.date2008-03-03
dc.date2008-12-18
dc.date.accessioned2026-07-07T12:35:57Z
dc.date.available2026-07-07T12:35:57Z
dc.descriptionTunneling between different topological sectors with dynamical chiral fermions is difficult because of a poor mass scaling of the pseudo-fermion estimate of the determinant. For small fermion masses it is virtually impossible using standard methods. However, by projecting out the small Wilson eigenvectors from the overlap operator, and treating the correction determinant exactly, we can significantly increase the rate of topological sector tunneling and reduce substantially the auto-correlation time. We present and compare a number of different approaches, and advocate a method which allows topological tunneling even at low mass with little addition to the computational cost.
dc.description17 pages; v2 as accepted in computer Physics Communications
dc.identifierhttps://arxiv.org/abs/0803.0294
dc.identifierhttp://arxiv.org/abs/0803.0294
dc.identifierComput.Phys.Commun.180:201-208,2009
dc.identifierdoi:10.1016/j.cpc.2008.09.010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/217933
dc.subjectHigh Energy Physics - Lattice
dc.titleTopological tunneling with Dynamical overlap fermions
dc.typetext

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