Kaluza-Klein Theory in Perspective
M. J. Duff

TL;DR
This paper reviews the modern perspective on Kaluza-Klein theory, emphasizing its role in unification and superstring theory, and introduces the novel interpretation of string states as black holes.
Contribution
It provides a contemporary overview of internal dimensions in physics and presents a new interpretation of Kaluza-Klein string states as extreme black holes.
Findings
Kaluza-Klein dimensions are integral to unification theories.
Superstring theory incorporates internal dimensions.
Kaluza-Klein string states can be viewed as extreme black holes.
Abstract
The Kaluza-Klein idea of extra spacetime dimensions continues to pervade current attempts to unify the fundamental forces, but in ways somewhat different from that originally envisaged. We present a modern perspective on the role of internal dimensions in physics, focussing in particular on superstring theory. A novel result is the interpretation of Kaluza-Klein string states as extreme black holes.(Talk delivered at the Oskar Klein Centenary Nobel Symposium, Stockholm, September 19-21, 1994.)
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Taxonomy
TopicsBlack Holes and Theoretical Physics · Relativity and Gravitational Theory · Cosmology and Gravitation Theories
