Physics
Scientific paper
Apr 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.314..409g&link_type=abstract
Nature (ISSN 0028-0836), vol. 314, April 4, 1985, p. 409-414.
Physics
23
Gravitation Theory, Particle Theory, Quantum Theory, Unified Field Theory, Chiral Dynamics, Dimensions, Elementary Particle Interactions, Gauge Theory, Space-Time Functions, Symmetry, Yang-Mills Theory
Scientific paper
The structure of superstring theories developed over the past five years is reviewed, describing in particular how these theories are restricted by requiring that they be consistent with quantum mechanics. The nature of superstrings, the relevance of superstring theory for grand unification and super-symmetry, and the chirality constraint on the theories are addressed. Three classifications of string theories are described along with the formulation of a superstring field theory which provides a framework for describing the interactions between strings in the language of quantum field theory. Superstring anomaly cancellations are discussed. The appearance of string theory as an effective point theory at low energies is considered, as is the collapse of the six extra dimensions in superstring theory to the four space-time dimensions at energies well below the Planck scale.
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