Schedule
Non-Perturbative Effects in Superstring and Yang--Mills Theory
Michael Green
This talk surveys some higher derivative terms in the effective IIB superstring action that can be expressed as integrals over half the on-shell superspace and whose form is known exactly. Examples are the (Weyl tensor)**4 term and the sixteen-dilatino term, each of which is multiplied by an exactly determined nonholomorphic modular form which depends on the complex scalar field. The expansion for small exp**phi has no perturbative contributions beyond one loop and an infinite series of D-instanton terms, with fluctuations at all orders around each instanton. The charge-K D-instanton measure is related to the bulk contribution to the Witten index for K D-particles in the IIA theory and has a form that is suggests the presence of threshold bound states. Upon compactifying on AdS5 X S5 these IIB interactions are translated into exact non-perturbative statements in maximally supersymmetric four-dimensional SU(N) Yang--Mills theory at order N**(-3/2) in the large-N limit. A correspondence between the classical D-instanton of the bulk IIB theory and the Yang--Mills instanton is demonstrated and some instanton dominated Yang--Mills correlation functions are compared with D-instanton amplitudes in IIB supergravity.
hep-th/9712195,hep-th/9804170,hep-th/9807033

Audio for this talk requires sound hardware, and RealPlayer or RealAudio by RealNetworks.

Begin continuous audio for the whole talk. (Or, right-click to download the whole audio file.)

To begin viewing slides, click on the first slide below.

[01] [02] [03] [04] [05] [06] [07] [08] [09] [10] [11] [12] [13] [14]

Author entry (protected)