Locality and topology with fat link overlap actions

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

We study the locality and topological properties of fat link clover overlap (FCO) actions. We find that a small amount of fattening already results in greatly improved properties compared to the Wilson overlap (WO). We present a detailed study of the localization of the FCO and its connection to the density of low modes of A† A. In contrast with the Wilson overlap, on quenched gauge backgrounds we do not find any dependence of the localization of the FCO on the gauge coupling. This suggests that the FCO remains local in the continuum limit. The FCO also faithfully reproduces the zero mode wave functions of typical lattice instantons, not like the Wilson overlap. After a general discussion of different lattice definitions of the topological charge we also show that the FCO together with the Boulder charge are likely to satisfy the index theorem in the continuum limit. Finally, we present a high statistics computation of the quenched topological susceptibility with the FCO action.

Original languageEnglish
Article number094501
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume67
Issue number9
DOIs
Publication statusPublished - 2003

Fingerprint

fats
Locality
Overlap
topology
Topology
Continuum Limit
continuums
Gauge
instantons
Charge
Higher statistics
Index Theorem
theorems
Instantons
statistics
Topological Properties
wave functions
Wave Function
magnetic permeability
Susceptibility

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Locality and topology with fat link overlap actions. / Kovács, T.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 67, No. 9, 094501, 2003.

Research output: Contribution to journalArticle

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