KFU. Card publication. Propagation of gravitational waves in Chern

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FEDERAL UNIVERSITY

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PROPAGATION OF GRAVITATIONAL WAVES IN CHERN&NDASH;SIMONS AXION F(R) GRAVITY

Form of presentation

Articles in international journals and collections

Year of publication

2020

Язык

английский

Authors, employees of KFU

Odincov Sergey Dmitrievich, author

Popov Arkadiy Aleksandrovich, author

Other authors

Nojiri Shin?ichi , author

Oikonomou Vasilis , author

Bibliographic description in the original language

Nojiri Sh. Propagation of gravitational waves in Chern–Simons axion F(R) gravity / Sh. Nojiri, S.D. Odintsov, V.K. Oikonomou, A.A. Popov // Physics of the Dark Universe. - 2020. - Vol. 28. - P.100514 (10)

Annotation

In this paper we shall study the evolution of cosmological gravitational waves in the context of Chern-Simons axion F(R) gravity. In the case of Chern-Simons axion F(R) gravity there exist spin-0, spin-2 and spin-1 modes. As we demonstrate, from all the gravitational waves modes of the Chern-Simons axion F(R) gravity, only the two tensor modes are affected, while the spin-0 and spin-1 modes are not affected at all. With regard to the two tensor modes, we show that these modes propagate in a non-equivalent way, so the resulting tensor modes are chiral. Notably, with regard to the propagation of the spin-2 graviton modes, the structure of the dispersion relations becomes more complicated in comparison with the Einstein gravity with the Chern-Simons axion, but the resulting qualitative features of the propagating modes are not changed. With regard to the spin-0 and spin-1 modes, the Chern-Simons axion $F(R)$ gravity contains two spin-0 modes and no vector spin-1 mode at all. We also find that for the very high energy mode, both the group velocity and the phase velocity are proportional to the inverse of the square root of the wave number, and therefore the velocities become smaller for larger wave numbers or even vanish in the limit that the wave number goes to infinity.

Keywords

gravitational waves, Chern-Simons axion F(R) gravity, tensor modes

The name of the journal

Physics of the Dark Universe

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/158268/F_S2212686420300558.pdf?sequence=1&isAllowed=y

URL

https://reader.elsevier.com/reader/sd/pii/S2212686420300558?token=AD09A8A596B16B7E941245320DD4F5217E96FAB56F8E24759E5BEDDB80851E978622EBF483F2A9DDCD7B8E76CF1D7811

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=227907&p_lang=2

Resource files

File name	Size (MB)	Format
F_S2212686420300558.pdf	0,24	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Odincov Sergey Dmitrievich	ru_RU
dc.contributor.author	Popov Arkadiy Aleksandrovich	ru_RU
dc.contributor.author	Nojiri Shin?ichi	ru_RU
dc.contributor.author	Oikonomou Vasilis	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	Nojiri Sh. Propagation of gravitational waves in Chern–Simons axion F(R) gravity / Sh. Nojiri, S.D. Odintsov, V.K. Oikonomou, A.A. Popov // Physics of the Dark Universe. - 2020. - Vol. 28. - P.100514 (10)	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=227907&p_lang=2	ru_RU
dc.description.abstract	Physics of the Dark Universe	ru_RU
dc.description.abstract	In this paper we shall study the evolution of cosmological gravitational waves in the context of Chern-Simons axion F(R) gravity. In the case of Chern-Simons axion F(R) gravity there exist spin-0, spin-2 and spin-1 modes. As we demonstrate, from all the gravitational waves modes of the Chern-Simons axion F(R) gravity, only the two tensor modes are affected, while the spin-0 and spin-1 modes are not affected at all. With regard to the two tensor modes, we show that these modes propagate in a non-equivalent way, so the resulting tensor modes are chiral. Notably, with regard to the propagation of the spin-2 graviton modes, the structure of the dispersion relations becomes more complicated in comparison with the Einstein gravity with the Chern-Simons axion, but the resulting qualitative features of the propagating modes are not changed. With regard to the spin-0 and spin-1 modes, the Chern-Simons axion $F(R)$ gravity contains two spin-0 modes and no vector spin-1 mode at all. We also find that for the very high energy mode, both the group velocity and the phase velocity are proportional to the inverse of the square root of the wave number, and therefore the velocities become smaller for larger wave numbers or even vanish in the limit that the wave number goes to infinity.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	gravitational waves	ru_RU
dc.subject	Chern-Simons axion F(R) gravity	ru_RU
dc.subject	tensor modes	ru_RU
dc.title	Propagation of gravitational waves in Chern–Simons axion F(R) gravity	ru_RU
dc.type	Articles in international journals and collections	ru_RU