PIRSA:26020041 Scientific Series Strong Gravity

DOI10.48660/26020041

Series: Strong Gravity

Xie, Y. (2026). Inspiral Tests of GR Beyond Smooth Post-Newtonian Deviations. Perimeter Institute. https://pirsa.org/26020041

Xie, Yiqi. Inspiral Tests of GR Beyond Smooth Post-Newtonian Deviations. Perimeter Institute, Feb. 19, 2026, https://pirsa.org/26020041 

@misc{ pirsa_PIRSA:26020041,
  doi = {10.48660/26020041},
  url = {https://pirsa.org/26020041},
  author = {Xie, Yiqi},
  keywords = {Strong Gravity},
  language = {en},
  title = {Inspiral Tests of GR Beyond Smooth Post-Newtonian Deviations},
  publisher = {Perimeter Institute},
  year = {2026},
  month = {feb},
  note = {PIRSA:26020041 see, \url{https://pirsa.org}}
}

Abstract

Gravitational waves (GW) from compact binaries provide excellent opportunities for testing general relativity (GR) in the strong- and dynamical-field regime. So far, inspiral-based tests have mostly assumed smooth deviations from GR within a post-Newtonian description, thereby overlooking certain beyond-GR effects that can arise in well-motivated extensions including quantum gravity, dark energy, and dark matter. In this talk, I will present an example of such an overlooked effect arising from massive scalar fields nonminimally coupled to gravity, and discuss recent constraints on this scenario using GW observations. I will then introduce a recently developed AI-based approach that incorporates both smooth and nonsmooth deviations within a unified, theory-agnostic parametrization for inspiral tests of GR. 

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