I give a brief review of the status of research on the nature of initial conditions required to
obtain a period of cosmological inflation. It is shown that there is good evidence that in the …

Chern-Simons gravity is known to suffer from graviton ghost production during inflation,
which suppresses the parity-violating power spectrum at scales relevant to cosmic …

In the present paper, we perform a sub-Planckian quantum mode analysis of linear
cosmological perturbation in the inflaton field over a classical quasi de-Siter metric …

We study the non-Gaussianities in quasi-single field inflation with a warm inflation
background. The thermal effects at small scales can sufficiently enhance the magnitude of …

A bstract The behaviour of a massive, non-interacting and non-minimally coupled quantised
scalar field in an expanding de Sitter background is investigated by solving the field …

In this paper, we generalize Jordan-Lee-Preskill, an algorithm for simulating flat-space
quantum field theories, to 3+ 1 dimensional inflationary spacetime. The generalized …

We construct a new model of quintessential $\alpha $-attractor inflation in conjunction with
the features of non-oscillating early dark energy (EDE). Slow-roll plateau of this model is …

We consider implications of the quantum extension of the inflationary no-hair theorem. We
show that when the quantum state of inflation is picked to ensure the validity of the effective …

This is a technical note on the i epsilon prescription in cosmology where we consider a self-
interacting scalar field in the Poincare patch of the de Sitter space whose Hamiltonian has …

A bstract We study the decoherence of massive fields during inflation based on the Zurek's
density matrix approach. With the cubic interaction between inflaton and massive fields, the …