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Comments On String Theory
Edward Witten
String theory avoids the ultraviolet infinities that arise in trying to quantize gravity. It is also more predictive than conventional quantum field theory, one aspect of this bein…
Singularities in string theory
Edward Witten
String theory is a quantum theory that reproduces the results of General Relativity at long distances but is completely different at short distances. Mathematically, string theory…
Unification Scale, Proton Decay, And Manifolds Of G_2 Holonomy
Tamar Friedmann, Edward Witten
Models of particle physics based on manifolds of holonomy are in most respects much more complicated than other string-derived models, but as we show here they do have one si…
Quest For Unification
Edward Witten
The GUT-based approach to physics has been attractive since it was first put forward close to thirty years ago; it has been enriched by new ideas, notably supersymmetry and strings…
A Note on Fluxes and Superpotentials in M-theory Compactifications on Manifolds of G_2 Holonomy
Chris Beasley, Edward Witten
We consider the breaking of N=1 supersymmetry by non-zero G-flux when M-theory is compactified on a smooth manifold X of G_2 holonomy. Gukov has proposed a superpotential W to desc…
A Gravity Dual of the Chiral Anomaly
Igor R. Klebanov, Peter Ouyang, Edward Witten
We study effects associated with the chiral anomaly for a cascading gauge theory using gauge/gravity duality. In the gravity dual the anomaly is a classical f…