We review applications of string theory to cosmology, from primordial times to the present-
day accelerated expansion. Starting with a brief overview of cosmology and string …

We review the status of solitons in superstring theory, with a view to understanding the
strong coupling regime. These solitonic solutions are non-singular field configurations which …

We examine the possibility of the existence of a large internal dimension at relatively low
energies of the order of a few TeV. Such a dimension is a general prediction of perturbative …

We investigate the properties of chiral operators in N= 2 superconformal theories. In
particular, we study the spectral flow of such models under a one-parameter family of twists …

We discuss the particle physics basis for models of natural inflation with pseudo Nambu-
Goldstone bosons and study the consequences for large-scale structure of the nonscale …

We consider a system comprised of an axion (described by a rank-three antisymmetric
tensor field strength) coupled to gravity. Instantons are found which describe the nucleation …

We obtain the vacuum solutions for M-theory compactified on eight-manifolds with non-
vanishing four-form flux by analyzing the scalar potential appearing in the three-dimensional …

A bstract We draw attention to a class of generalized global symmetries, which we call
“Chern-Weil global symmetries,” that arise ubiquitously in gauge theories. The Noether …

Abstract We calculate the Fayet-Iliopoulos D-terms generated at one loop for the heterotic
string in any background which preserves four-dimensional space-time supersymmetry and …

Theoretical and experimental research on general relativity with torsion is reviewed. An
introductory section establishes definitions and notation, introduces tetrads, the …