The Master Field for Rainbow Diagrams and Free Non-Commutative Random Variables
L. Accardi, I. Ya. Aref'eva, I. V. Volovich
Abstract
The master field for a subclass of planar diagrams, so called rainbow diagrams, for higher dimensional large N theories is considered. An explicit representation for the master field in terms of noncommutative random variables in the modified interaction representation in the Boltzmannian Fock space is given. A natural interaction in the Boltzmannian Fock space is formulated by means of a rational function of the interaction Lagrangian instead of the ordinary exponential function in the standard Fock space.
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