Anomalous dispersion in gravity theories

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2022-03-01

Author

Altas, Emel
Kilicarslan, Ercan
Tekin, Bayram

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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's principle.

URI

https://hdl.handle.net/11511/97296

Journal

PHYSICAL REVIEW D

DOI

https://doi.org/10.1103/physrevd.105.064027

Collections

Department of Physics, Article

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Citation Formats

E. Altas, E. Kilicarslan, and B. Tekin, “Anomalous dispersion in gravity theories,” PHYSICAL REVIEW D, vol. 105, no. 6, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://hdl.handle.net/11511/97296.