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The index theorem on the lattice with improved fermion actions

Repositori DSpace/Manakin

dc.contributor.author	Hernández Gamazo, Pilar
dc.date.accessioned	2015-04-24T09:38:42Z
dc.date.available	2015-04-24T09:38:42Z
dc.date.issued	1998
dc.identifier.citation	Hernández Gamazo, Pilar 1998 The index theorem on the lattice with improved fermion actions Nuclear Physics B 536 1-2 345 362
dc.identifier.uri	http://hdl.handle.net/10550/43349
dc.description.abstract	We consider a Wilson-Dirac operator with improved chiral properties. We show that, for arbitrarily rough gauge fields, it satisfies the index theorem if we identify the zero modes with the small real eigenvalues of the fermion operator and use the geometrical definition of topological charge. This is also confirmed in a numerical study of the quenched Schwinger model. These results suggest that integer definitions of the topological charge based on counting real modes of the Wilson operator are equivalent to the geometrical definition. The problem of exceptional configurations and the sign problem in simulations with an odd number of dynamical Wilson fermions are briefly discussed.
dc.language.iso	eng
dc.relation.ispartof	Nuclear Physics B, 1998, vol. 536, num. 1-2, p. 345-362
dc.subject	Física
dc.title	The index theorem on the lattice with improved fermion actions
dc.type	journal article	es_ES
dc.date.updated	2015-04-24T09:38:42Z
dc.identifier.doi	10.1016/S0550-3213(98)00533-1
dc.identifier.idgrec	081416
dc.rights.accessRights	open access	es_ES