Gauge Theories from Dp-branes

Abstract

In this talk we discuss the need to introduce a string theory in order to obtain a consistent quantum theory of gravity unified with gauge interactions. We then discuss some basic properties of string theory and the origin and the properties of the D(irichlet)-branes. Finally we use them for discussing the Maldacena conjecture and its extension to non-conformal and less supersymmetric theories.Comment: 9 pages, Latex, Talk given at TRENTO 2001, Trento, Italy (September 2001