We review the paradigm of holographic dark energy (HDE), which arises from a theoretical
attempt of applying the holographic principle (HP) to the dark energy (DE) problem. Making …

The discovery of the accelerating universe in the late 1990s was a watershed moment in
modern cosmology, as it indicated the presence of a fundamentally new, dominant …

The Hubble tension has now grown to a level of significance which can no longer be
ignored and calls for a solution which, despite a huge number of attempts, has so far eluded …

This paper presents cosmological results based on full-mission Planck observations of
temperature and polarization anisotropies of the cosmic microwave background (CMB) …

We study the implications of Planck data for models of dark energy (DE) and modified gravity
(MG) beyond the standard cosmological constant scenario. We start with cases where the …

The current discrepancy between the Hubble constant, H 0, derived from the local distance
ladder and from the cosmic microwave background is one of the most crucial issues in …

The accelerating expansion of the universe is the most surprising cosmological discovery in
many decades, implying that the universe is dominated by some form of “dark energy” with …

We review in detail a number of approaches that have been adopted to try and explain the
remarkable observation of our accelerating universe. In particular we discuss the arguments …

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Ten years ago, the discovery that the expansion of the universe is accelerating put in place
the last major building block of the present cosmological model, in which the universe is …