Biharmonic Conformal Field Theories

Details Biharmonic Conformal Field Theories Biharmonic Conformal Field Theories

1995-07-26

arxiv.org/abs/hep-th/9507142v1

Phys.Lett. B382 (1996) 349-355

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, LaTeX, no figures

Scientific paper

10.1016/0370-2693(96)00677-6

The main result of this paper is the construction of a conformally covariant operator in two dimensions acting on scalar fields and containing fourth order derivatives. In this way it is possible to derive a class of Lagrangians invariant under conformal transformations. They define conformal field theories satisfying equations of the biharmonic type. Two kinds of these biharmonic field theories are distinguished, characterized by the possibility or not of the scalar fields to transform non-trivially under Weyl transformations. Both cases are relevant for string theory and two dimensional gravity. The biharmonic conformal field theories provide higher order corrections to the equations of motion of the metric and give a possibility of adding new terms to the Polyakov action.

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