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Título: | Multifractional spacetimes, asymptotic safety and Hořava-Lifshitz gravity |
Autor: | Calcagni, Gianluca CSIC ORCID | Palabras clave: | [PACS] Fractals [PACS] Renormalization [PACS] Field theories in dimensions other than four [PACS] Quantum gravity |
Fecha de publicación: | 2013 | Editor: | World Scientific Publishing | Citación: | International Journal of Modern Physics A 28 (2013) | Resumen: | We compare the recently formulated multifractional spacetimes with field theories of quantum gravity based on the renormalization group (RG), such as asymptotic safety and Hořava-Lifshitz gravity. The change of spacetime dimensionality with the probed scale is realized in both cases by an adaptation of the measurement tools (>rods>) to the scale, but in different ways. In the multifractional case, by an adaptation of the position-space measure, which can be encoded into an explicit scale dependence of effective coordinates. In the case of RG-based theories, by an adaptation of the momenta. The two pictures are mapped into each other, thus presenting the fractal structure of spacetime in RG-based theories under an alternative perspective. © 2013 World Scientific Publishing Company. | URI: | http://hdl.handle.net/10261/104689 | DOI: | 10.1142/S0217751X13500929 | Identificadores: | doi: 10.1142/S0217751X13500929 issn: 0217-751X |
Aparece en las colecciones: | (CFMAC-IEM) Artículos |
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