Corpus ID: 232307442

CMB birefringence from ultra-light axion string networks

@inproceedings{Jain2021CMBBF,
  title={CMB birefringence from ultra-light axion string networks},
  author={Mudit Jain and A. J. Long and M. Amin},
  year={2021}
}
The polarization of Cosmic Microwave Background (CMB) photons is rotated as they pass through (ultralight-) axion string loops. Studying this birefringence can reveal valuable information about the axion-photon coupling and the structure of the string network. We develop an approximate analytic formalism and identify a kernel function that can be used to calculate the two-point correlation function for CMB birefringence induced by an arbitrary axion string network. Using this formalism, we… Expand
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