Infinities as a measure of our ignorance
Abstract
The quantization of gravity offers a solution to the presence of singularities in cosmology. Infinities are removed because of the existence of finite quanta of spacetime. This is one of the most important prediction of Loop Quantum Gravity. But treating gravity on the same footing as the other quantum field theories introduces a different kind of infinities: the ones from the renormalization procedure. In the covariant formulation of Loop Quantum Gravity (Spinfoam) this kind of infinities are tamed by the presence of the cosmological constant. These two results are guided by a specific perspective on the appearance of infinity in physics: this is just interpreted as a signpost that the theory should be improved. It arises from our limited knowledge, and not as a fundamental fact of nature.
Keywords
Cite
@article{arxiv.1305.2358,
title = {Infinities as a measure of our ignorance},
author = {Francesca Vidotto},
journal= {arXiv preprint arXiv:1305.2358},
year = {2013}
}
Comments
12 pages, talk presented at the workshop "Infinities and Cosmology", DAMPT, Cambridge, UK, 21st March 2013. arXiv admin note: text overlap with arXiv:1105.1898 by other authors