Ervin Goldfain. Objections to Quantum Gravity Theories Based on Causal Dynamical Triangulation
Submitted on: Feb 26, 2012, 17:47:58
Natural Sciences / Physics / Quantum field theory
Description: This memo is in regards to the recently published contribution by Ambjorn J. et al. "Planckian Birth of Quantum de Sitter Universe" PRL 100, 091304 (2008). The article claims that "causal dynamical triangulation" enables a consistent regularization of quantum gravity. A "quantum universe" emerging from a nonperturbative sum over geometries is alleged to recover "with high accuracy a fourdimensional de Sitter space-time". On closer examination, the approach is built on many objectionable premises
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Objections to Quantum Gravity Theories Based on Causal Dynamical Triangulation.pdf