Intersections of thick, plane SU(2) center vortices are characterized by thetopological charge |Q|=1/2. We compare such intersections with the distributionof zeromodes of the Dirac operator in the fundamental and adjointrepresentation using both the overlap and asqtad staggered fermion formulationsin SU(2) lattice gauge theory. We analyze configurations with fourintersections and find that the probability density distribution of fundamentalzeromodes in the intersection plane differs significantly from the one obtainedanalytically in [Phys.\ Rev.\ D 66, 85004 (2002)]. The Dirac eigenmodes areclearly sensitive to the traces of the Polyakov (Wilson) lines and do notexactly locate topological charge contributions. Although, the adjoint Diracoperator is able to produce zeromodes for configurations with topologicalcharge |Q|=1/2, they do not locate single vortex intersections, as we prove byforming arbitrary linear combinations of these zeromodes - their scalar densitypeaks at least at two intersection points. With pairs of thin and thickvortices we realize a situation similar to configurations with topologicalcharge |Q|=1/2. For such configurations the zeromodes do not localize in theregions of fractional topological charge contribution but spread over the wholelattice, avoiding regions of negative traces of Polyakov lines.
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