Is string theory a theory of quantum gravity?

Details Is string theory a theory of quantum gravity? Is string theory a theory of quantum gravity?

2011-05-31

arxiv.org/abs/1105.6359v2

Physics

High Energy Physics

High Energy Physics - Theory

Invited contribution for "Forty Years of String Theory: Reflecting on the Foundations," a special issue of Found. Phys., ed. b

Scientific paper

Some problems in finding a complete quantum theory incorporating gravity are discussed. One is that of giving a consistent unitary description of high-energy scattering. Another is that of giving a consistent quantum description of cosmology, with appropriate observables. While string theory addresses some problems of quantum gravity, its ability to resolve these remains unclear. Answers may require new mechanisms and constructs, whether within string theory, or in another framework.

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