Axions, Domain Walls, and the Early Universe

Phys. Rev. Lett. 48, 1156 – Published 26 April 1982
P. Sikivie


Axion models have a spontaneously broken Z(N) symmetry. The resulting discretely degenerate vacua and domain-wall solitons are incompatible with the standard cosmology. It is possible, however, to introduce a small Z(N) breaking interaction into axion models without upsetting the Peccei-Quinn mechanism. In that case the domain walls disappear a certain time after their formation in the early universe. Their presence for a limited time period might lead to galaxy formation.


  • Received 8 February 1982
  • Published in the issue dated 26 April 1982

© 1982 The American Physical Society

Authors & Affiliations

P. Sikivie

  • Department of Physics, University of Florida, Gainesville, Florida 32611

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