52 citations · 274 across the 20 of their papers we have counts for
20 papers
Metric and coupling reversal in string theory
M. J. Duff, Jussi Kalkkinen
Invariance under reversing the sign of the metric G_{MN}(x) and/or the sign of the string coupling field H(x), where <H(x)> = g_s, leads to four possible Universes denoted 1,I,J,K…
Signature reversal invariance
M. J. Duff, Jussi Kalkkinen
We consider the signature reversing transformation of the metric tensor g_ab goes to -g_ab induced by the chiral transformation of the curved space gamma matrices gamma_a goes to g…
Global Spinors and Orientable Five-Branes
Jussi Kalkkinen
Fermion fields on an M-theory five-brane carry a representation of the double cover of the structure group of the normal bundle. It is shown that, on an arbitrary oriented Lorentzi…
Non-Geometric Magnetic Flux and Crossed Modules
Jussi Kalkkinen
It is shown that the BRST operator of twisted N=4 Yang-Mills theory in four dimensions is locally the same as the BRST operator of a fully decomposed non-Abelian gerbe. Using local…
Topological Quantum Field Theory on Non-Abelian Gerbes
Jussi Kalkkinen
The infinitesimal symmetries of a fully decomposed non-Abelian gerbe can be generated in terms of a nilpotent BRST operator, which is here constructed. The appearing fields find a…
Holonomies of Intersecting Branes
Jussi Kalkkinen
We discuss the geometry of string and M-theory gauge fields in Deligne cohomology. In particular, we show how requiring string structure (or loop space Spin-C structure) on the fiv…