I briefly review our current understanding of dark matter and dark energy. The first part of this
review focusses on issues pertaining to dark matter including observational evidence for its …

We present a brief, and to a great extent, pedagogical, review on renormalization in curved
spacetime and some recent results on the derivation and better understanding of quantum …

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The cosmological constant (CC) term in Einstein's equations, Λ, was first associated to the
idea of vacuum energy density. Notwithstanding, it is well-known that there is a huge, in fact …

In this paper, we use the type Ia supernovae data to constrain the holographic dark energy
model proposed by Li. We also apply a cosmic age test to this analysis. We consider in this …

I review the problem of dark energy focussing on cosmological constant as the candidate
and discuss what it tells us regarding the nature of gravity. Section 1 briefly overviews the …

Despite the many outstanding cosmological observations leading to a strong evidence for a
non-vanishing cosmological constant (CC) term Λ in the gravitational field equations, the …

We investigate the properties of the FLRW flat cosmological models in which the vacuum
energy density evolves with time, Λ (t). Using different versions of the Λ (t) model, namely …

We present a model for the Universe in which quantum anomalies are argued to play an
important dual role: they are responsible for generating matter-antimatter asymmetry in the …

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