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Exponentially Small Cosmological Constant in String Theory.

Mehmet Demirtas1, Manki Kim1, Liam McAllister1

  • 1Department of Physics, Cornell University, Ithaca, New York 14853, USA.

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|January 21, 2022
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Summary
This summary is machine-generated.

Researchers developed a supersymmetric string theory vacuum with extremely low vacuum energy (<10^{-123} Planck units). This breakthrough offers a novel solution to the cosmological constant problem using controlled exponential hierarchies.

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Area of Science:

  • String theory
  • High-energy physics
  • Cosmology

Background:

  • The cosmological constant problem, the vast discrepancy between theoretical predictions and observed vacuum energy, remains a major challenge in physics.
  • Supersymmetric theories offer potential solutions by relating bosons and fermions, but constructing realistic vacua with the correct energy scale is difficult.

Purpose of the Study:

  • To construct a supersymmetric vacuum within string theory that yields a naturally small vacuum energy.
  • To explore a mechanism for generating an exponential hierarchy of energy scales.
  • To offer a new perspective on the cosmological constant problem.

Main Methods:

  • Construction of a supersymmetric vacuum in string theory.
  • Introduction of a novel mechanism to generate controlled exponential hierarchies.
  • Utilizing specific quantized parameters within the superpotential.

Main Results:

  • Successfully constructed a supersymmetric vacuum with a vacuum energy magnitude less than 10^{-123} in Planck units.
  • Demonstrated a method for generating a well-controlled exponential hierarchy.
  • Provided a new theoretical framework for addressing the cosmological constant problem.

Conclusions:

  • The proposed supersymmetric vacuum offers a viable pathway to a small, observable vacuum energy.
  • The mechanism for generating exponential hierarchies is robust and controllable.
  • This work presents a significant advancement in theoretical cosmology and string theory model building.