4 papers
Instanton Solutions of the Topological A-model Dual to Free Super-Yang-Mills
Nathan Berkovits
A topological A-model constructed from supertwistor variables and a worldsheet U(1) gauge field was recently proposed to describe the superstring at zero radius w…
Topological A-Model for Superstring and the Maldacena Conjecture
Nathan Berkovits
A topological A-model constructed from supertwistor variables is proposed for the superstring. At zero radius, free N=4 d=4 super-Yang-Mills ampl…
Equivalence Proof of Pure Spinor and Ramond-Neveu-Schwarz Superstring Amplitudes
Nathan Berkovits
A new manifestly spacetime-supersymmetric prescription for superstring amplitude computations is given using the pure spinor formalism which does not contain subtleties from poles…
Heterotic String Field Theory with Manifest Spacetime Supersymmetry
Nathan Berkovits, Ulisses M. Portugal
Using the hybrid formalism with manifest spacetime supersymmetry, we construct the quadratic term in the heterotic superstring field theory action. As in open superstri…