After a decade and a half of research motivated by the accelerating universe, theory and
experiment have reached a certain level of maturity. The development of theoretical models …

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 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 …

The wealth of incoming and future cosmological observations will allow us to map out the
structure and evolution of the observable universe to an unprecedented level of precision …

On very large scales, density fluctuations in the Universe are small, suggesting a
perturbative model for large-scale clustering of galaxies (or other dark matter tracers), in …

Modifications of general relativity provide an alternative explanation to dark energy for the
observed acceleration of the universe. We review recent developments in modified gravity …

Measuring the statistics of galaxy peculiar velocities using redshift-space distortions is an
excellent way of probing the history of structure formation. Because galaxies are expected to …

We analyze f (R) modifications of Einstein's gravity as dark energy models in the light of their
connection with chameleon theories. Formulated as scalar-tensor theories, the f (R) theories …

The six-meter Atacama Cosmology Telescope (ACT) in Chile was built to measure the
cosmic microwave background (CMB) at arcminute angular scales. We are building a new …

We present measurements of the auto-and cross-frequency power spectra of the cosmic
infrared background (CIB) at 250, 350, and 500 μm (1200, 860, and 600 GHz) from …