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1 year ago in Physics , Quantum Gravity By Venu R
Could the Universe Be Modeled as a Lattice-Vacuum Structure?
Given the persistent challenges in quantizing gravity, I'm exploring discrete foundational models. The idea of a cosmic lattice, like in some quantum gravity approaches, seems compelling, but I'm skeptical about its ability to recover Lorentz invariance and standard cosmology at our observational scales.
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By Devatest Answered 1 year ago
It's a powerful effective model I've used in computational approaches like causal dynamical triangulations. As a fundamental "what the universe is" description, I'm cautious. The major hurdle is the recovery of continuous symmetries like Lorentz invariance at low energies. While a lattice can naturally regulate infinities, getting a smooth, isotropic cosmology to emerge is nontrivial. The recommendation is to treat it as a provable framework for exploring Planck-scale physics, not necessarily as a literal depiction, unless evidence like gamma-ray burst dispersion emerges.
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