Abstract Neutrinos are the Standard Model (SM) particles which we understand the least,
often due to how weakly they interact with the other SM particles. Beyond this, very little is …

We present in a manifestly gauge-invariant form the theory of classical linear gravitational
perturbations in part I, and a quantum theory of cosmological perturbations in part II. Part I …

We review potential low-frequency gravitational-wave sources, which are expected to be
detected by Taiji, a Chinese space-based gravitational-wave detector, estimate the detection …

The production of a stochastic background of gravitational waves is a fundamental
prediction of any cosmological inflationary model. The features of such a signal encode …

The Early Universe has become the standard reference on forefront topics in cosmology,
particularly to the early history of the Universe. Subjects covered include primordial …

Dynamics of non-equilibrium phase transition in the early universe is investigated. The
transition is triggered by vacuum fluctuations of a Higgs scalar field which determine the …

Reheating after inflation occurs due to particle production by the oscillating inflaton field. In
this paper we briefly describe the perturbative approach to reheating, and then concentrate …

The creation and evolution of energy-density perturbations are analyzed for the" new
inflationary universe" scenario proposed by Linde, and Albrecht and Steinhardt. According …

The horizon, flatness and monopole problems can be solved if the universe underwent an
exponentially expanding stage which ended with a Higgs scalar field running slowly down …

“Dark quark nuggets,” a lump of dark quark matter, can be produced in the early universe for
a wide range of confining gauge theories and serve as a macroscopic dark matter …