Bose-Einstein Condensation of Dark Matter Axions

Journal Article · Fri Sep 11 00:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.111301· OSTI ID:21364682

Sikivie, P; Yang, Q ^[1]

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1. Department of Physics, University of Florida, Gainesville, Florida 32611 (United States)

We show that cold dark matter axions thermalize and form a Bose-Einstein condensate (BEC). We obtain the axion state in a homogeneous and isotropic universe, and derive the equations governing small axion perturbations. Because they form a BEC, axions differ from ordinary cold dark matter in the nonlinear regime of structure formation and upon entering the horizon. Axion BEC provides a mechanism for the production of net overall rotation in dark matter halos, and for the alignment of cosmic microwave anisotropy multipoles.

• OSTI ID: 21364682
• Journal Information: Physical Review Letters, Vol. 103, Issue 11; Other Information: DOI: 10.1103/PhysRevLett.103.111301; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
AXIONS
BOSE-EINSTEIN CONDENSATION
EQUATIONS
MICROWAVE RADIATION
MULTIPOLES
NONLINEAR PROBLEMS
NONLUMINOUS MATTER
PERTURBATION THEORY
ROTATION
UNIVERSE
BOSONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
GOLDSTONE BOSONS
MATTER
MOTION
POSTULATED PARTICLES
RADIATIONS