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Propagation of Gravitational Waves in Chern-Simons Axion Einstein Gravity

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arxiv 1909.01324 v2 pith:YF5GDKUP submitted 2019-09-03 gr-qc hep-th

Propagation of Gravitational Waves in Chern-Simons Axion Einstein Gravity

Shin'ichi Nojiri , S.D. Odintsov , V.K. Oikonomou , Arkady A. Popov This is my paper
classification gr-qc hep-th
keywords propagationaxioneinsteingravitationalgravityshallwaveschern-simons
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In this paper we shall investigate the propagation of gravitational waves in a flat Friedman-Robertson-Walker background, in the context of a string motivated corrected Einstein gravity. Particularly, we shall consider a misalignment axion Einstein gravity in the presence of a string originating Chern-Simons coupling of the axion field to the Chern-Pontryagin density in four dimensions. We shall focus our study on the propagation of the gravitational waves, and we shall investigate whether there exists any difference in the propagation of the polarization states of the gravitational waves. As we demonstrate, the dispersion relations are different in the Right-handed mode and the Left-handed mode. Finally, we compare the propagation of the axion Chern-Simons Einstein theory with that of standard $F(R)$ gravity.

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Cited by 3 Pith papers

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