890 research outputs found
Handle Operators of Coset Models
Several interesting features of coset models "without fixed points" are
easily understood via Chern-Simons theory. In this paper we derive explicit
formulae for the handle-squashing operator in these cosets. These operators are
fixed, linear combinations of the irreducible representations of the coset. As
a simple application of these curious formulae, we compute the traces of all
genus-one operators for several common cosets. (1 Figure, at end in
encapsulated postscript- to locate use 'find figs')Comment: 22 pages, 1 fi
Field Strength Correlators For 2D Yang-Mills Over Riemann Surfaces
The path integral computation of field strength correlation functions for two
dimensional Yang-Mills theories over Riemann surfaces is studied. The
calculation is carried out by abelianization, which leads to correlators that
are topological. They are nontrivial as a result of the topological
obstructions to the abelianization. It is shown in the large N limit on the
sphere that the correlators undergo second order phase transitions at the
critical point. Our results are applied to a computation of contractible Wilson
loops.Comment: final version to appear in Int. Jour. Mod. Phys. A, minor
corrections, added a few comments on Wilson loops and non-abelian Stokes
theore
In memory of Prof. Giuseppe Amato (1944-2004)
Held by Prof. Giuseppe Crescimanno on November 25th 2014 at the Department of Experimental Biomedicine and Clinical Neurosciences University of Palermo, Italy.peer-reviewe
Corpo, sensibilità ed esperienza: la riflessione di Paul Valéry alla luce dell’estetica pragmatista
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