Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2004-12-21
Nucl.Phys. B716 (2005) 105-127
Physics
High Energy Physics
High Energy Physics - Lattice
Some comments reworded,reference added. To appear in Nucl. Phys. B
Scientific paper
10.1016/j.nuclphysb.2005.03.027
We study the interplay between Dirac eigenmodes and center vortices in SU(2) lattice gauge theory. In particular we focus on vortex-removed configurations and compare them to an ensemble of configurations with random changes of the link variables. We show that removing the vortices destroys all zero modes and the near zero modes are no longer coupled to topological structures. The Dirac spectrum for vortex-removed configurations in many respects resembles a free spectrum thus leading to a vanishing chiral condensate. Configurations with random changes leave the topological features of the Dirac eigensystem intact. We finally show that smooth center vortex configurations give rise to zero modes and topological near zero modes.
Gattnar Jochen
Gattringer Christof
Langfeld Kurt
Reinhardt Hugo
Sch{ä}fer Andreas
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