122 citations · 520 across the 20 of their papers we have counts for
4 papers · 1 filter
Spacetime foam in twistor string theory
Sean A. Hartnoll, Giuseppe Policastro
We show how a Kahler spacetime foam in four dimensional conformal (super)gravity may be mapped to twistor spaces carrying the D1 brane charge of the B model topological string theo…
String quantization: Fock vs. LQG Representations
Robert C. Helling, Giuseppe Policastro
We set up a unified framework to compare the quantization of the bosonic string in two approaches: One proposed by Thiemann, based on methods of loop quantum gravity, and the other…
Strings in Twistor Superspace and Mirror Symmetry
S. Prem Kumar, Giuseppe Policastro
We obtain the super-Landau-Ginzburg mirror of the A-twisted topological sigma model on a twistor superspace -- the quadric in CP^{3|3} x CP^{3|3} which is a Calabi-Yau supermanifol…
Superstrings and WZNW Models
P. A. Grassi, G. Policastro, P. van Nieuwenhuizen
We give a brief review of our approach to the quantization of superstrings. New is a covariant derivation of the measure at tree level and a path integral formula for this measure.