An introduction to the covariant quantization of superstrings
Abstract
We give an introduction to a new approach to the covariant quantization of superstrings. After a brief review of the classical GreenSchwarz superstring and Berkovits' approach to its quantization based on pure spinors, we discuss our covariant formulation without pure spinor constraints. We discuss the relation between the concept of grading, which we introduced to define vertex operators, and homological perturbation theory, and we compare our work with recent work by others. In the appendices, we include some background material for the GreenSchwarz and Berkovits formulations, in order that this presentation be selfcontained.
 Publication:

Classical and Quantum Gravity
 Pub Date:
 June 2003
 DOI:
 10.1088/02649381/20/12/304
 arXiv:
 arXiv:hepth/0302147
 Bibcode:
 2003CQGra..20S.395G
 Keywords:

 High Energy Physics  Theory
 EPrint:
 LaTex, 23 pp. Contribution to the Proceedings of the Workshop in String Theory, Leuven 2002, some references added and a comment on ref. [16]