135 citations · 461 across the 7 of their papers we have counts for
14 papers · 1 filter
Instantons beyond topological theory II
E. Frenkel, A. Losev, N. Nekrasov
The present paper is the second part of our project in which we describe quantum field theories with instantons in a novel way by using the "infinite radius limit" (rather than the…
Instantons beyond topological theory I
E. Frenkel, A. Losev, N. Nekrasov
Many quantum field theories in one, two and four dimensions possess remarkable limits in which the instantons are present, the anti-instantons are absent, and the perturbative corr…
Multiloop Superstring Amplitudes from Non-Minimal Pure Spinor Formalism
Nathan Berkovits, Nikita Nekrasov
Using the non-minimal version of the pure spinor formalism, manifestly super-Poincare covariant superstring scattering amplitudes can be computed as in topological string theory wi…
Lectures on curved beta-gamma systems, pure spinors, and anomalies
Nikita Nekrasov
The curved beta-gamma system is the chiral sector of a certain infinite radius limit of the non-linear sigma model with complex target space. Naively it only depends on the complex…
The Character of Pure Spinors
Nathan Berkovits, Nikita Nekrasov
The character of holomorphic functions on the space of pure spinors in ten, eleven and twelve dimensions is calculated. From this character formula, we derive in a manifestly covar…
ABCD of instantons
Nikita Nekrasov, Sergey Shadchin
We solve N=2 supersymmetric Yang-Mills theories for arbitrary classical gauge group, i.e. SU(N), SO(N), Sp(N). In particular, we derive the prepotential of the low-energy effective…