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Exotic branes and nongeometric backgrounds.

Jan de Boer1, Masaki Shigemori

  • 1Institute for Theoretical Physics, University of Amsterdam Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands.

Physical Review Letters
|September 28, 2010
PubMed
Summary

Exotic branes in string theory arise from nongeometric backgrounds, not standard branes. These U-folds are crucial for understanding systems with exotic charges produced by the supertube effect, impacting black hole microstate geometries.

Area of Science:

  • Theoretical Physics
  • String Theory
  • M-Theory

Background:

  • String theory and M-theory compactification predict exotic branes.
  • The origin of these exotic branes is not explained by standard branes.
  • Exotic charges can arise generically from the supertube effect.

Purpose of the Study:

  • To explain the higher-dimensional origin of exotic branes.
  • To connect exotic branes to nongeometric backgrounds and U-folds.
  • To discuss the implications of exotic backgrounds for black hole microstates.

Main Methods:

  • Analysis of U-duality symmetry in compactified string/M theory.
  • Theoretical framework for understanding exotic branes as nongeometric backgrounds or U-folds.
  • Investigation of the supertube effect's role in generating exotic charges.

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Main Results:

  • Exotic branes can be interpreted as nongeometric backgrounds or U-folds in higher dimensions.
  • The supertube effect is identified as a mechanism producing exotic charges.
  • Exotic backgrounds have significant implications for black hole microstate geometries.

Conclusions:

  • Exotic branes are understood as U-folds or nongeometric backgrounds.
  • The supertube effect necessitates considering exotic charges in certain systems.
  • The study provides insights into black hole microstate (non-)geometries through exotic backgrounds.