Supplying dark energy from scalar field dark matter
نویسندگان
چکیده
منابع مشابه
Dark Matter and Dark Energy from a single scalar field
The strong CP problem was solved by Peccei & Quinn by introducing axions, which are a viable candidate for DM. Here the PQ approach is modified so to yield also Dark Energy (DE), which arises in fair proportions, without tuning any extra parameter. DM and DE arise from a single scalar field and, in the present ecpoch, are weakly coupled. Fluctuations have a fair evolution. The model is also fit...
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متن کاملUnifying Dark Energy and Dark Matter with a Scalar Field
The standard model of cosmology considers the existence of two components of unknown nature, “dark matter” and “dark energy”, which determine the cosmological evolution. Their nature remains unknown, and other models can also be considered. In particular, it may be possible to reinterpret the recent cosmological observations so that the Universe does not contain two fluids of unknown natures, b...
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We explore unification of dark matter and dark energy in a theory containing a scalar field of nonLagrangian type, obtained by direct insertion of a kinetic term into the energy-momentum tensor. This scalar is different from quintessence, having an equation of state between 1 and 0 and a zero sound speed in its rest frame. We solve the equations of motion for an exponential potential via a rewr...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2018
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271818501006