Anomalous dispersion in gravity theories

Autor:	Emel Altas, Ercan Kilicarslan, Bayram Tekin
Přispěvatelé:	Altaş, Emel
Rok vydání:	2022
Předmět:	High Energy Physics - Theory General Relativity and Quantum Cosmology High Energy Physics - Theory (hep-th) FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) Mathematical Physics (math-ph) Mathematical Physics
Zdroj:	Physical Review D. 105
ISSN:	2470-0029 2470-0010
DOI:	10.1103/physrevd.105.064027
Popis:	A wave pulse (be it a gravitational wave or a light wave) undergoes anomalous dispersion in a vacuum in flat spacetimes with an even number of spatial dimensions even if all the frequencies move at the same speed. Such an anomalous dispersion does not occur in spacetimes with an odd number of spatial dimensions. We study various gravity theories and show that dispersion-free propagation is possible in even number of spatial dimensions if the background is not the Minkowski but the de Sitter spacetime and the gravity theory is massive gravity with a tuned mass in terms of the cosmological constant. Mass and the cosmological constant conspire to get rid of the anomalous dispersion and restore Huygens' principle. Comment: 16 pages, v2 matches the published version with additional references
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b9e2eaeb4061adc39159e640c24cb32 https://doi.org/10.1103/physrevd.105.064027 Zobrazit plný text záznamu