Early Universe

The Early Universe

An introductory account is given of the modern understanding of the physics of the early Universe. Particular emphasis is placed on the paradigm of cosmological inflation, which postulates a period of accelerated expansion during the Universe’s earliest stages. Inflation provides a possible origin for structure in the Universe, such as microwave background anisotropies, galaxies and galaxy clus...

The Very Early Universe

In these lectures we dwell upon the cosmological cornerstones of the Very Early Universe (VEU) theory: Parametric Amplification Effect (PAE) responsible for the generation of Pri

Early Universe Cosmology and Supergravity

Like particle physics cosmology also confronts hierarchical scales; e.g. Planck scale Mp = 2.436 × 10 GeV, and big bang nucleosynthesis scale TBBN ∼ 1 MeV, and uncertainties. Unfortunately there is no direct evidence of thermal history of the Universe beyond T ∼ 1 MeV. Though there are indirect evidences which when tied up with particle physics makes a strong case that thermal history could go ...

Reionization of the early Universe

Disorder in the early universe

Little is known about the microscopic physics that gave rise to inflation in our universe. There are many reasons to wonder if the underlying description requires a careful arrangement of ingredients or if inflation was the result of an essentially random process. At a technical level, randomness in the microphysics of inflation is closely related to disorder in solids. We develop the formalism...