Cosmological perturbations for ultralight axionlike particles in a state of Bose-Einstein condensate

For ultralight scalar particles like axions, dark matter can form a state of the Bose-Einstein condensate (BEC) with a coherent classical wave whose wavelength is of order galactic scales. In the context of an oscillating scalar field with mass m, this BEC description amounts to integrating out the...

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Veröffentlicht in:	Physical review. D 2021-06, Vol.103 (12), p.1, Article 123533
1. Verfasser:	Tsujikawa, Shinji
Format:	Artikel
Sprache:	eng
Schlagworte:	Bose-Einstein condensates Cold dark matter Gravitational instability Perturbation Radiation Scalars
Online-Zugang:	Volltext
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