TY  - JOUR
AU  - Bruckmann, Falk
AU  - Gruber, Florian
AU  - Cundy, Nigel
AU  - Schäfer, Andreas
AU  - Lippert, Thomas
TI  - Topology of dynamical lattice configurations including results from dynamical overlap fermions
JO  - Physics letters / B
VL  - 707
IS  - 2
SN  - 0370-2693
CY  - Amsterdam
PB  - North-Holland Publ.
M1  - FZJ-2015-03413
SP  - 278 - 285
PY  - 2012
AB  - We investigate how the topological charge density in lattice QCD simulations is affected by violations of chiral symmetry caused by the fermion action. To this end we compare lattice configurations generated with a number of different actions including first configurations generated with exact dynamical overlap quarks. We visualize the topological profiles after mild smearing. In the topological charge correlator we measure the size of the positive core, which is known to shrink to zero extension in the continuum limit. To leading order we find the core size to scale linearly with the lattice spacing with the same coefficient for all actions, even including quenched simulations. In the subleading term the different actions vary over a range of about 10%. Our findings suggest that non-chiral lattice actions at current lattice spacings do not differ much for observables related to topology, both among themselves and compared to overlap fermions.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000300134400008
DO  - DOI:10.1016/j.physletb.2011.12.030
UR  - https://juser.fz-juelich.de/record/201108
ER  -