Fuzzy Dark Matter from Clockwork Axion Model

Kyu Jung Bae, Jinn Ouk Gong

Research output: Contribution to journalArticlepeer-review


We consider in the clockwork axion model the realization of an ultralight axion which can serve as a fuzzy dark matter candidate. With the mixing terms between adjacent axions, the shift symmetries are broken except for one, which is responsible for the ultralight axion and its mass can be as light as 10−21 eV. This ultralight axion can satisfy easily the observed dark matter abundance and the isocurvature bound. The heavier axions resulting from the clockwork gears quickly decay before the big bang nucleosynthesis.

Original languageEnglish
Pages (from-to)1107-1112
Number of pages6
JournalJournal of the Korean Physical Society
Issue number12
StatePublished - Dec 2020

Bibliographical note

Publisher Copyright:
© 2020, The Korean Physical Society.


  • Axion
  • Clockwork
  • Dark matter
  • Fuzzy dark matter


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