Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-03-10
JHEP 0306 (2003) 044
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, 8 eps figures, LaTeX2.09; title changed, mistakes corrected
Scientific paper
10.1088/1126-6708/2003/06/044
Inspired by the intimate relationship between Voiculescu's noncommutative probability theory (of type A) and large-N matrix models in physics, we look for physical models related to noncommutative probability theory of type B. These turn out to be fermionic matrix-vector models at the double large-N limit. In the context of string theory, they describe different orbifolded string worldsheets with boundaries. Their critical exponents coincide with that of ordinary string worldsheets, but their renormalised tree-level one-boundary amplitudes differ.
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