Dark energy condensation
نویسندگان
چکیده
منابع مشابه
Dark Energy Condensation
The two most popular candidates for dark energy, i.e. a cosmological constant and quintessence, are very difficult to distinguish observationally, mostly because the quintessence field does not have sizable fluctuations. We study a scalar field model for dark energy in which the scalar field is invariant under reflection symmetry φ → −φ. Under general assumptions, there is a phase transition at...
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Motivated by the seeming coincidence of the neutrino mass scale and the dark energy scale, we propose to explain the cosmic dark energy by neutrino condensation. Similar to the idea of top-quark condensation, we assume that a four-fermion interaction for the third-family neutrino is induced from some unknown new dynamics which is strong enough to cause neutrino condensation. In the low-energy e...
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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 mechanis...
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I briefly review our current understanding of dark matter and dark energy. The first part of this paper focusses on issues pertaining to dark matter including observational evidence for its existence, current constraints and the ‘abundance of substructure’ and ‘cuspy core’ issues which arise in CDM. I also briefly describe MOND. The second part of this review focusses on dark energy. In this pa...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2005
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.72.043535