• Corpus ID: 252408826

Generation of gravitational waves in dynamical Chern-Simons gravity

@inproceedings{Peng2022GenerationOG,
  title={Generation of gravitational waves in dynamical Chern-Simons gravity},
  author={Zhiwei Peng and Zhenyuan Zeng and Ch'eng Yi Fu and Zong-Kuan Guo},
  year={2022}
}
We investigate gravitational waves (GWs) generated in a two-field inflationary model with a non-canonical kinetic term, in which the gravitational Chern-Simons term is coupled to a heavy dynamical field. In such a model, primordial GWs experience a period of resonant amplification for some modes. In addition, isocurvature perturbations suffer from a temporary tachyonic instability due to an effective negative mass, which source curvature perturbations, resulting in large induced GWs. These two… 

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