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Article

Graviton to Photon Conversion in Curved Space-Time and External Magnetic Field

by
Alexander D. Dolgov
1,2,*,
Lyubov A. Panasenko
1 and
Vladimir A. Bochko
1
1
Department of Physics, Novosibirsk State University, Pirogova 2, 630090 Novosibirsk, Russia
2
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
*
Author to whom correspondence should be addressed.
Universe 2024, 10(1), 7; https://doi.org/10.3390/universe10010007
Submission received: 5 November 2023 / Revised: 22 December 2023 / Accepted: 22 December 2023 / Published: 25 December 2023
(This article belongs to the Special Issue The Friedmann Cosmology: A Century Later)
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Abstract

The suppression of relic gravitational waves due to their conversion into electromagnetic radiation in a cosmological magnetic field is studied. The coupled system of equations describing gravitational and electromagnetic wave propagation in an arbitrary curved space-time and in external magnetic field is derived. The subsequent elimination of photons from the beam due to their interaction with the primary plasma is taken into account. The resulting system of equations is solved numerically in the Friedman–LeMaitre–Robertson–Walker metric for the upper limit of the intergalactic magnetic field strength of 1 nGs. We conclude that the gravitational wave conversion into photons in the intergalactic magnetic field cannot significantly change the amplitude of the relic gravitational wave and their frequency spectrum.
Keywords: gravitational waves; cosmological magnetic field; expanding universe; Heisenberg–Euler action; gravitational wave conversion; curved space-time; Friedman–LeMaitre–Robertson–Walker space-time gravitational waves; cosmological magnetic field; expanding universe; Heisenberg–Euler action; gravitational wave conversion; curved space-time; Friedman–LeMaitre–Robertson–Walker space-time

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MDPI and ACS Style

Dolgov, A.D.; Panasenko, L.A.; Bochko, V.A. Graviton to Photon Conversion in Curved Space-Time and External Magnetic Field. Universe 2024, 10, 7. https://doi.org/10.3390/universe10010007

AMA Style

Dolgov AD, Panasenko LA, Bochko VA. Graviton to Photon Conversion in Curved Space-Time and External Magnetic Field. Universe. 2024; 10(1):7. https://doi.org/10.3390/universe10010007

Chicago/Turabian Style

Dolgov, Alexander D., Lyubov A. Panasenko, and Vladimir A. Bochko. 2024. "Graviton to Photon Conversion in Curved Space-Time and External Magnetic Field" Universe 10, no. 1: 7. https://doi.org/10.3390/universe10010007

APA Style

Dolgov, A. D., Panasenko, L. A., & Bochko, V. A. (2024). Graviton to Photon Conversion in Curved Space-Time and External Magnetic Field. Universe, 10(1), 7. https://doi.org/10.3390/universe10010007

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