Topic
String (physics)
About: String (physics) is a research topic. Over the lifetime, 16998 publications have been published within this topic receiving 493430 citations.
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TL;DR: In this article, a new framework for solving the hierarchy problem has been proposed which does not rely on low energy supersymmetry or technicolor, and this framework can be embedded in string theory.
3,922 citations
TL;DR: It is shown that D-branes, extended objects defined by mixed Dirichlet-Neumann boundary conditions, break half the supersymmetries of the type II superstring and carry a complete set of electric and magnetic Ramond-Ramond charges.
Abstract: We show that D-branes, extended objects defined by mixed Dirichlet-Neumann boundary conditions, break half the supersymmetries of the type II superstring and carry a complete set of electric and magnetic Ramond-Ramond charges. The product of the electric and magnetic charges is a single Dirac unit, and the quantum of charge is that required by string duality. This is strong evidence that D-branes are intrinsic to type II string theory and are the Ramond-Ramond sources needed for string duality. Also, we find in the IIa string a 9-form potential, which gives an effective cosmological constant.
3,151 citations
Posted Content•
TL;DR: The first part is an introduction to conformal field theory and string perturbation theory and the second part deals with the search for a deeper answer to the question posed in the title as discussed by the authors.
Abstract: The first part is an introduction to conformal field theory and string perturbation theory. The second part deals with the search for a deeper answer to the question posed in the title. Contents:
1. Conformal Field Theory
2. String Theory
3. Vacua and Dualities
4. String Field Theory or Not String Field Theory
5. Matrix Models
3,106 citations
Book•
27 Jan 1995
TL;DR: In this article, the authors discuss the role of topological defects in the early universe and the evolution of string fields and their relationship with the structure formation of strings, including superconducting and global strings.
Abstract: Preface 1. Introduction 2. Phase transitions in the early universe 3. Topological defects 4. String field theory 5. Superconducting strings 6. String dynamics 7. String gravity 8. String interactions 9. String evolution 10. Cosmological implications of strings 11. Structure formation with strings 12. Cosmology of superconducting and global strings 13. Domain walls 14. Monopoles 15. Textures 16. Topological defects and inflation References Index.
2,714 citations
TL;DR: In this paper, the string spectrum in flat space and pp-waves arises from the large-N limit, at fixed g2YM, of U(N) = 4 super Yang Mills.
Abstract: We explain how the string spectrum in flat space and pp-waves arises from the large-N limit, at fixed g2YM, of U(N) = 4 super Yang Mills. We reproduce the spectrum by summing a subset of the planar Feynman diagrams. We give a heuristic argument for why we can neglect other diagrams. We also discuss some other aspects of pp-waves and we present a matrix model associated to the DLCQ description of the maximally supersymmetric eleven dimensional pp-waves.
2,181 citations