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Natural inflation and quantum gravity.

Anton de la Fuente1, Prashant Saraswat1,2, Raman Sundrum1

  • 1Department of Physics, University of Maryland, College Park, Maryland 20742, USA.

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Summary
This summary is machine-generated.

Cosmic inflation models are constrained by quantum gravity. This study shows higher-dimensional dynamics satisfy these constraints, enabling viable natural inflation models.

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Area of Science:

  • Cosmology
  • Quantum Gravity
  • Theoretical Physics

Background:

  • Cosmic inflation is a leading paradigm for the early Universe and cosmic microwave background.
  • Inflationary models can approach energies relevant to quantum gravity.
  • Black hole mechanics impose constraints on effective field theories of inflation, like the weak gravity conjecture.

Purpose of the Study:

  • To investigate if higher-dimensional gauge and gravitational dynamics can satisfy quantum gravity constraints on inflation.
  • To develop a theoretically controlled and predictive class of natural inflation models.

Main Methods:

  • Analysis of higher-dimensional gauge and gravitational dynamics.
  • Application of constraints from black hole quantum mechanics, specifically the weak gravity conjecture.

Main Results:

  • Demonstrated that higher-dimensional dynamics can elegantly satisfy the weak gravity conjecture.
  • Identified a viable class of natural inflation models consistent with quantum gravity.

Conclusions:

  • Higher-dimensional gauge and gravitational theories offer a promising framework for natural inflation.
  • These models provide a theoretically controlled and predictive approach to understanding the early Universe.