Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-12-19
Nucl.Phys.Proc.Suppl.109A:116-120,2002
Physics
High Energy Physics
High Energy Physics - Lattice
5 pages, 4 figures, talk presented at the workshop on Lattice Hadron Physics, Cairns Australia, July 2001
Scientific paper
10.1016/S0920-5632(02)01399-3
The dynamics of instantons and anti-instantons in lattice QCD can be studied by analysing the action and topological charge of configurations as they approach a self-dual or anti-self-dual state, i.e. a state in which S/S_0=|Q|. We use cooling to reveal the semi-classical structure of the configurations we study. Improved actions which eliminate discretization errors up to and including O(a^4) are used to stabilise instantons as we cool for several thousand sweeps. An analogously improved lattice version of the continuum field-strength tensor is used to construct a topological charge free from O(a^4) discretization errors. Values of the action and topological charge obtained with these improved operators approach mutually-consistent integer values to within a few parts in 10^4 after several hundred cooling sweeps. Analysis of configurations with |Q| \approx 1 and |Q| \approx 2 supports the hypothesis that a self-dual |Q|=1 configuration cannot exist on the 4-torus.
Bilson-Thompson Sundance
Bonnet Frederic D. R.
Leinweber Derek B. .
Williams Anthony G.
No associations
LandOfFree
Cooling for instantons and the Wrath of Nahm does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cooling for instantons and the Wrath of Nahm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cooling for instantons and the Wrath of Nahm will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-521464