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Dark energy from discrete spacetime.

Aaron D Trout1

  • 1Department of Mathematics, Chatham University, Pittsburgh, Pennsylvania, United States of America.

Plos One
|December 7, 2013
PubMed
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This summary is machine-generated.

Dark energy may arise from spacetime

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Area of Science:

  • Cosmology
  • Quantum Gravity
  • Theoretical Physics

Background:

  • Dark energy constitutes the majority of the universe's matter-energy content.
  • Existing theories for dark energy involve speculative concepts like the holographic principle or anthropic arguments.

Purpose of the Study:

  • To propose a more grounded explanation for dark energy.
  • To investigate the role of spacetime's fundamental properties in dark energy's origin.

Main Methods:

  • Utilizing a variant of the dynamical triangulations (DT) model for quantum gravity.
  • Explicitly computing the effect of discrete spacetime geometry on curvature.
  • Characterizing DT action values and analyzing their degeneracies.

Main Results:

  • A novel explanation for dark energy originating from negative scalar-curvature in empty spacetime.
  • The vacuum possesses inherent negative curvature due to the discrete nature of spacetime.
  • A time-varying, non-zero cosmological constant is predicted, consistent with observational data.

Conclusions:

  • The discrete nature of spacetime provides a compelling origin for dark energy.
  • The dynamical triangulations model offers a calculable framework for understanding dark energy.
  • The predicted cosmological constant aligns with current astronomical observations.