Nonlinear gravitational-wave memory from cusps and kinks on cosmic strings

@article{Jenkins2021NonlinearGM,
  title={Nonlinear gravitational-wave memory from cusps and kinks on cosmic strings},
  author={Alexander C. Jenkins and Mairi Sakellariadou},
  journal={Classical and Quantum Gravity},
  year={2021},
  volume={38}
}
The nonlinear memory effect is a fascinating prediction of general relativity (GR), in which oscillatory gravitational-wave (GW) signals are generically accompanied by a monotonically-increasing strain which persists in the detector long after the signal has passed. This effect is directly accessible to GW observatories, and presents a unique opportunity to test GR in the dynamical and nonlinear regime. In this article we calculate, for the first time, the nonlinear memory signal associated… 
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