Since the standard inflationary paradigm is based on quantum field theory on classical space-times, it excludes the Planck era. Using techniques from loop quantum gravity, the paradigm is extended to a self-consistent theory from the Planck scale to the onset of slow roll inflation, covering some 11 orders of magnitude in energy density and curvature. This preinflationary dynamics also opens a small window for novel effects, e.g., a source for non-Gaussianities, which could extend the reach of cosmological observations to the deep Planck regime of the early Universe. © 2012 American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Agullo, I., Ashtekar, A., & Nelson, W. (2012). Quantum gravity extension of the inflationary scenario. Physical Review Letters, 109 (25) https://doi.org/10.1103/PhysRevLett.109.251301