A note on initial state entanglement in inflationary cosmology

Comments on Inflationary Cosmology

In this talk we will discuss three different issues. First of all, there exist several proposals how to solve cosmological problems by adiabatic expansion of the Universe of a specific type, without any use of inflation. We explain why these models do not solve the flatness/entropy problem. On the other hand there exist some claims that inflation also does not solve the flatness problem. We sho...

Lectures on Inflationary Cosmology

An Exposition on Inflationary Cosmology

This paper is intended to offer a pedagogical treatment of inflationary cosmology, which is accessible to undergraduates. In recent years, inflation has become accepted as a standard scenario making predictions that are testable by observations of the cosmic background. It is therefore manifest that anyone wishing to pursue the study of cosmology and large-scale structure should have this scena...

Graviton Production in Inflationary Cosmology

We provide a completely quantum-mechanical derivation of the spectrum of gravitational waves produced in any inflationary cosmology. The gravitational waves result from a sequence of Bogoliubov transformations between creation and annihilation operators defined in de Sitter space and in radiation-and matter-dominated Robertson-Walker spacetimes. We discuss how the results depend on the initial ...

Recent Progress in Inflationary Cosmology

We discuss two important modifications of inflationary paradigm. Until very recently we believed that inflation automatically leads to flatness of the universe, Ω = 1± 10. We also thought that post-inflationary phase transitions in GUTs may occur only after thermalization, which made it very difficult to have baryogenesis in GUTs and to obtain superheavy topological defects after inflation. We ...