Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-12-29
Physics
High Energy Physics
High Energy Physics - Theory
118 pages (german) latex
Scientific paper
In this work we describe the mathematical foundations used in the construction of primary fields of minimal models of conformal field theory. The work contains two parts: In the first part we give a description of Verma and Fock modules for the Virasoro algebra and develop their imbedding patterns. This part is a simplification of the work of Feigin and Fuks (we correct a mistake in their patterns in the case III_+), Rocha-Charidi and some new ideas which yield a simplification of the original papers. In the second part we define (free) vertex operators as unbounded Hilbert space operators, acting on Fock spaces, which are Virasoro modules. We prove several properties of these operators: under appropriate conditions vertex operators are densely defined, not closable operators. Radially ordered products of vertex operators exists on a dense subset. We prove commutation relations between vertex operators and elements of the Virasoro algebra. Next we define, following the (non rigouros) work of G. Felder, integrated vertex operators and prove that these operators resemble the properties of the not integrated vertex operators. Special integrated vertex operators can be identified with conformal fields and a Virasoro invariant subspace of Fock space can be identified with the physical Hilbert space for the conformal theory.
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