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Spacelike brane actions.

Koji Hashimoto1, Pei-Ming Ho, John E Wang

  • 1Institute of Physics, University of Tokyo, Komaba, Tokyo 153-8902, Japan. koji@hep1.c.u-tokyo.ac.jp

Physical Review Letters
|May 7, 2003
PubMed
Summary

Researchers derived effective actions for spacelike branes (S-branes), revealing how fundamental strings form during tachyon condensation. This study details the process of fundamental string production from rolling tachyon backgrounds.

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Area of Science:

  • High Energy Physics
  • String Theory
  • Theoretical Physics

Background:

  • Non-BPS (Bogomol'nyi-Prasad-Sommerfield) branes undergo time-dependent tachyon condensation.
  • Understanding the dynamics of branes and string formation is crucial in string theory.

Purpose of the Study:

  • To derive effective actions for spacelike branes (S-branes).
  • To describe the formation of fundamental strings in a rolling tachyon background.
  • To analyze the connection between BIon spike solutions and string production.

Main Methods:

  • Derivation of effective actions for S-branes using a Dirac-Born-Infeld (DBI) formalism.
  • Analysis of Euclidean world volumes in time-dependent tachyon condensation.
  • Investigation of scalar fields associated with time translation.

Main Results:

  • The S-brane action is a DBI action for Euclidean world volumes.
  • BIon spike solutions correspond to the production of confined electric flux tubes (fundamental strings).
  • Fundamental string formation is observed at late times in the rolling tachyon scenario.

Conclusions:

  • The study provides a framework for understanding string formation from tachyon condensation.
  • Effective actions for S-branes offer insights into non-BPS brane dynamics.
  • The results link theoretical constructs to observable phenomena in string theory.

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