25. Geometry and causal structure of de Sitter space (Inflationary perturbations 4)
I discuss geometry, causal structure and behavior of QFT Green functions in de Sitter space
24. Inflation: description in terms of hydrodynamics (Inflationary perturbations 4)
This post continues my lecture notes on large scale structure, cosmological perturbations and inflation. The last post in this series was about the problem of initial conditions in FRW cosmology. (…)
13. Eye on ArXiv: 7 Apr 2008 - Gravity cutoff in theories with large descrete symmetries
Gia Dvali, Michele Redi, Sergey Sibiryakov, Arkady Vainshtein, “Gravity Cutoff in Theories with Large Discrete Symmetries”
It is a development of one year old extremely elegant Dvali’s idea that the possible maximal number of species is bounded by the gravitational physics. (…)
9. Introduction into perturbation theory in general relativity 2 (Inflationary perturbations 3)
Today I will continue our discussion of the perturbation theory in general relativity (please see the previous post here); in particular, I will focus my attention on the issue of gauge invariance.
1. (…)
8. Introduction into perturbation theory in general relativity (Inflationary perturbations 3)
Before turning to the discussion of the perturbation theory in general relativity, let me briefly remind the outline of the two previous posts (1 and 2). (…)
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