Mathai et al give a detailed analysis of the nature of D-branes, RR-charges and T-duality using and extending the topological/algebraic machinery known from “topological T-duality”.
Some aspects of recent work by Freed, Moore and Segal on the quantum theory of abelian p-form fields and the grading of the Hilbert space by electric and magnetic flux modulo torsion.
Talk by E. Markert on concepts and results in describing generalized cohomology in terms of euclidean field theory. Part I. Mostly pesonal remarks on the general program.
On the equivalence between algebroids, dg algebras and Lie p-algebras, the definition of algebroid YM theories and the relation to generalized geometry and abelian p-bundles and p-gerbes.
We have a new preprint demonstrating a relation between weak Lie 2-algebras, 2-groups coming from centrally extended loop groups and the group String(n).
The calculation of the exact lightcone spectrum of superstrings on AdS_3 x S^3 is reviewed as a preparation for a demonstration of perturbative calculations of the same thing using curvature corrections to the Penrose limit.
Motivated by the representation of the classical super Virasoro constraints as generalized Dirac-Kaehler constraints (d±d +)|ψ⟩=0(\mathbf{d} \pm \mathbf{d}^+)|\psi\rangle =…