Superstring theory
Abstract
The current status of cosmological string theory is briefly surveyed. The principles of the standard model of quantum gravity are reviewed; proposed modifications of the model are discussed; and it is shown how the basic assumption of string theory, that particles are onedimensional objects rather than dimensionless points, leads to requirements for gravity, supersymmetry, extra dimensions, gauge groups and matter multiplets, and an axion. The existence of a minimum distance in string theory is considered, along with the related possibility of a maximum scalar field value. It is also shown that string theory can provide both the technology and interpretation for experiments on topology change in quantum gravity.
 Publication:

Annals of the New York Academy of Sciences
 Pub Date:
 1989
 DOI:
 10.1111/j.17496632.1989.tb50492.x
 Bibcode:
 1989NYASA.571....9P
 Keywords:

 Bosons;
 Fermions;
 Gravitons;
 Leptons;
 Quantum Theory;
 String Theory;
 Relativity;
 SpaceTime Functions;
 Astrophysics