Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-02-22
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, phyzzx
Scientific paper
We describe some recent progress in understanding and formulating string theory which is based on extensive studies of strings in lower (D=2) dimension. At the center is a large $W_{\infty}$ symmetry that appears most simply in the matrix model picture. In turn the symmetry defines the dynamics giving Ward identities and the complete S-matrix. The integrability aspect where nonlinear string phenomena emerges from linear matrix model dynamics is emphasized. Extensions involving couplings of discrete topological fields to the tachyon are also described.
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