144 citations · 440 across the 17 of their papers we have counts for
17 papers
Geometric Aspects of D-branes and T-duality
Katrin Becker, Aaron Bergman
We explore the differential geometry of T-duality and D-branes. Because D-branes and RR-fields are properly described via K-theory, we discuss the (differential) K-theoretic genera…
AdS Wormholes
A. Bergman, H. Lu, Jianwei Mei +1
We obtain a large class of smooth Lorentzian p-brane wormholes in supergravities in various dimensions. They connect two asymptotically flat spacetimes. In cases where there is no…
Topological D-branes from Descent
Aaron Bergman
Witten couples the open topological B-model to a holomorphic vector bundle by adding to the boundary of the worldsheet a Wilson loop for an integrable connection on the bundle. Usi…
A Note on Support in Triangulated Categories
Aaron Bergman
In this note, I define a notion of a compactly supported object in a triangulated category. I prove a number of propositions relating this to traditional notions of support and giv…
Ramond-Ramond Fields, Cohomology and Non-Geometric Fluxes
Aaron Bergman, Daniel Robbins
We consider compactifications of type II string theory in which a d-dimensional torus is fibered over a base X. In string theory, the transition functions of this fibration need no…
Wormholes in Maximal Supergravity
Aaron Bergman, Jacques Distler
In this brief note, we reconsider the problem of finding Euclidean wormhole solutions to maximal supergravity in d dimensions. We find that such solutions exists for all d less tha…