Multifractional theories: an updated review
High Energy Physics - Theory
2021-08-16 v2 General Relativity and Quantum Cosmology
Abstract
The status of multifractional theories is reviewed using comparative tables. Theoretical foundations, classical matter and gravity dynamics, cosmology and experimental constraints are summarized and the application of the multifractional paradigm to quantum gravity is discussed. We also clarify the issue of unitarity in theories with integer-order derivatives.
Cite
@article{arxiv.2103.06557,
title = {Multifractional theories: an updated review},
author = {Gianluca Calcagni},
journal= {arXiv preprint arXiv:2103.06557},
year = {2021}
}
Comments
21 pages, 1 figure, 7 tables. Invited review article for the special issue "Fractional quantum theory" in Mod. Phys. Lett. A, ed. by S.C. Lim. v2: minor typos corrected, including in table 7 of the published version