Singularities in any physical theory are either remarkable indicators of the unknown
underlying fundamental theory, or indicate a change in the description of the physical reality …

Over the past decade, f (R) theories have been extensively studied as one of the simplest
modifications to General Relativity. In this article we review various applications of f (R) …

Abstract Recent Baryon Acoustic Oscillation (BAO) measurements released by DESI, when
combined with Cosmic Microwave Background (CMB) data from Planck and two different …

The cosmological dark sector remains an enigma, offering numerous possibilities for
exploration. One particularly intriguing option is the (non-minimal) interaction scenario …

Dark Energy - IOPscience Skip to content IOP Science home Accessibility Help Search all
IOPscience content Search Article Lookup Select journal (required) Volume number: Issue …

We review the paradigm of quintom cosmology. This scenario is motivated by the
observational indications that the equation-of-state of dark energy across the cosmological …

An important issue in cosmology is reconstructing the effective dark energy equation of state
directly from observations. With few physically motivated models, future dark energy studies …

We introduce two new diagnostics of dark energy (DE). The first, O m, is a combination of the
Hubble parameter and the cosmological redshift and provides a null test of dark energy …

We study the cosmological evolutions of the equation of state for dark energy w DE in the
exponential and logarithmic as well as their combination f (T) theories. We show that the …

This review summarizes recent attempts to reconstruct the expansion history of the universe
and to probe the nature of dark energy. Reconstruction methods can be broadly classified …