Scalar induced gravitational waves from Chern-Simons gravity during inflation era
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Publication:6175016
DOI10.1088/1475-7516/2023/07/047arXiv2302.00950OpenAlexW4384699540MaRDI QIDQ6175016
Author name not available (Why is that?)
Publication date: 17 August 2023
Published in: (Search for Journal in Brave)
Abstract: We investigate the scalar induced gravitational waves (SIGWs) in the Chern-Simons (CS) gravity with a dynamical scalar field during slow roll inflation. Due to the parity violation in the CS term, the SIGWs are generally polarized, which are effectively characterized by the degree of circular polarization. We derive the semianalytic expression to evaluate the power spectra and the degree of circular polarization of the SIGWs, which receive contributions from the general relativity and the parity-violating term, respectively. We find that the correction from the parity-violating CS term is negligible on large scales, which means that the degree of circular polarization of SIGWs is very small.
Full work available at URL: https://arxiv.org/abs/2302.00950
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