Journal Article

FZJ-2015-03413

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Topology of dynamical lattice configurations including results from dynamical overlap fermions

Bruckmann, F. ; Gruber, F. (Corresponding Author) ; Cundy, N. ; Schäfer, A. ; Lippert, T.FZJ*

2012
North-Holland Publ. Amsterdam

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/24296  doi:10.1016/j.physletb.2011.12.030

Abstract: 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.

---

Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 411 - Computational Science and Mathematical Methods (POF2-411) (POF2-411)

---

Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---