PSI 2016/2017 - String Theory (Gaiotto)

General considerations of string theory

The scattering amplitude of string perturbation theory as an integral over intrinsic geometry of the world sheet and a path integral over all possible emeddings of world-sheet in space-time; Nambu-Goto action and Polyakov action.

Complex structure moduli space and a free scalar on the cylinder

The bosonic string spectrum, a naive way.

Introduction to BRST quantization.

BRST quantization of string theory.

Hilbert space of string theory.

State-operator correpondence.

Tree amplitudes in string theory.

Effective action of string theory

D-branes

Superstring theory part 1.