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Related Experiment Videos

de Sitter vacua via consistent terms.

Giovanni Villadoro1, Fabio Zwirner

  • 1Dipartimento di Fisica, Università di Roma La Sapienza and INFN, Sezione di Roma, P.le Aldo Moro 2, I-00185 Rome, Italy.

Physical Review Letters
|December 31, 2005
PubMed
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We present a novel mechanism for creating stable de Sitter or Minkowski vacua in string theory. This method achieves broken supersymmetry and avoids massless scalars, offering control over vacuum energy in flux compactifications.

Area of Science:

  • Theoretical Physics
  • String Theory and M-Theory
  • Quantum Field Theory

Background:

  • Achieving stable de Sitter or Minkowski vacua is a significant challenge in string theory and M-theory compactifications.
  • Spontaneously breaking supersymmetry (N = 1) while avoiding massless scalars is crucial for realistic vacuum construction.
  • Flux compactifications are a key framework for addressing these challenges but require specific mechanisms for vacuum stability.

Purpose of the Study:

  • To introduce a new, general mechanism for generating stable de Sitter or Minkowski vacua.
  • To demonstrate the applicability of this mechanism within superstring and M-theory compactifications with fluxes.
  • To provide parametric control over the sign and magnitude of the vacuum energy.

Main Methods:

Related Experiment Videos

  • Development of a mechanism utilizing a gauged U(1) symmetry.
  • Incorporation of both axionic shift and R symmetry within the U(1) gauge.
  • Application to N = 1 supergravity models, specifically in the context of flux compactifications.

    • Main Results:

    • Successful production of locally stable de Sitter or Minkowski vacua.
    • Spontaneous breaking of N = 1 supersymmetry.
    • Absence of problematic massless scalars in the resulting vacuum states.

    Conclusions:

    • The proposed mechanism offers a viable route to constructing realistic vacua in string theory.
    • The gauged U(1) symmetry provides powerful constraints on potential contributions, ensuring stability.
    • This framework allows for controlled tuning of vacuum energy, essential for cosmological applications.