Exact solutions of Wheeler–DeWitt & Yamabe Construction

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SUMMARY

The discussion centers on the exact solutions of the Wheeler–DeWitt equation and the Yamabe construction as presented in the August 2015 issue of Annals of Physics. Authors Eyo Eyo Ita III and Chopin Soo demonstrate that these solutions are characterized by Schrödinger wavefunctionals supported on 3-metrics with constant spatial scalar curvature, effectively capturing two physical field degrees of freedom. The solutions are identified as Gaussians of minimum uncertainty and are linked to a rigged Hilbert space, ensuring the recovery of exact 3-dimensional diffeomorphism and local gauge invariance upon removing the regulator.

PREREQUISITES
  • Understanding of the Wheeler–DeWitt equation in quantum gravity
  • Familiarity with the Yamabe construction in differential geometry
  • Knowledge of Schrödinger wavefunctionals and their properties
  • Concepts of rigged Hilbert spaces in quantum mechanics
NEXT STEPS
  • Research the implications of the Wheeler–DeWitt equation in quantum cosmology
  • Explore the applications of the Yamabe construction in modern theoretical physics
  • Study the properties and applications of rigged Hilbert spaces
  • Investigate the role of diffeomorphism and gauge invariance in quantum field theories
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The discussion is beneficial for theoretical physicists, mathematicians specializing in differential geometry, and researchers focused on quantum gravity and cosmology.

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Annals of Physics
August 2015, Vol.359:80–96, doi:http://dx.doi.org/10.1016/j.aop.2015.04.016

Exact solutions of the Wheeler–DeWitt equation and the Yamabe construction
  • Eyo Eyo Ita III
  • Chopin Soo
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Abstract
Exact solutions of the Wheeler–DeWitt equation of the full theory of four dimensional gravity of Lorentzian signature are obtained. They are characterized by Schrödinger wavefunctionals having support on 3-metrics of constant spatial scalar curvature, and thus contain two full physical field degrees of freedom in accordance with the Yamabe construction. These solutions are moreover Gaussians of minimum uncertainty and they are naturally associated with a rigged Hilbert space. In addition, in the limit the regulator is removed, exact 3-dimensional diffeomorphism and local gauge invariance of the solutions are recovered.
 
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