53. Eternal inflation: stochastic approach 1 (Inflationary perturbations 7)
In this post I start to discuss physics of eternal inflation - regime where superhorizon cosmological perturbations become of the order 1.
45. Quantization of cosmological perturbations. Mukhanov-Sasaki variable (Inflationary perturbations 5)
I introduce Mukhanov-Sasaki variable, show how to quantize inflationary perturbations and again calculate the power spectrum of primordial perturbations - by QFT this time.
44. Cosmological perturbations in the presence of scalar field (Inflationary perturbations 5)
I discuss cosmological perturbation theory in the Universe where the dominant component of matter is a scalar field. It is show that spectrum of inflationary perturbations is nearly flat.
40. Inflation: field-theoretic description (Inflationary perturbations 4)
I discuss simplest field theoretic models of inflation, dynamics of inflation at the level of background and Hamilton-Jacobi formalism for inflation.
34. Several questions about de Sitter
I ask several questions about Green’s functions on de Sitter
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