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- W3098484920 abstract "We investigate a conformal invariant gravitational model which is taken to hold at early universe. The conformal invariance allows us to make a dynamical distinction between the two unit systems (or conformal frames) usually used in cosmology and elementary particle physics. In this model we argue that when the universe suffers phase transition, the resulting mass scale introduced by particle physics should have a variable contribution to vacuum energy density. This variation is controlled by the conformal factor which is taken as a dynamical field. We then deal with the cosmological consequences of this model. In particular, we shall show that there is an inationary phase at early times. At late times, on the other hand, it provides a mechanism which makes a large effective cosmological constant relax to a sufficiently small value. Moreover, we shall show that the conformal factor acts as a quintessence field that leads the universe to accelerate at late times." @default.
- W3098484920 created "2020-11-23" @default.
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- W3098484920 date "2004-10-01" @default.
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- W3098484920 title "Conformal Invariance, Accelerating Universe and the Cosmological Constant Problem" @default.
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- W3098484920 doi "https://doi.org/10.1023/b:ijtp.0000049015.53901.55" @default.
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