Fellow Craft
50. Planck 2008: day 4
4th day of the Planck 2008 was devoted to unparticle physics (feat. Howard Georgi himself) and AdS/QCD.
48. Planck 2008: day 3
The third day of Planck 2008 was devoted to experimental side of LHC, physics of hidden sectors, quirks and N=1 SQCD.
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.
43. Schwinger-Keldysh: Martin-Siggia-Rose diagrammatics (non-equilibrium diagrammatic methods 2)
I start to discuss Martin-Siggia-Rose diagrammatic methods and transition from Fokker-Planck equation back to quasiclassical Schwinger-Keldysh action.
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.
33. Schwinger-Keldysh: information carried by Keldysh Green’s functions (nonequilibrium diagrammatic methods 1)
I discuss information carried by Keldysh Green’s functions in the non-equilibrium quantum field theory.
31. Schwinger-Keldysh: brief review (Nonequilibrium diagrammatic methods 1)
I briefly discuss what physical problems require the use of non-equilibrium diagr. QFT methods. I also review the structure of Green functions in SK formalism.
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
19. Disorder on the landscape: non-technical intro
Today I will kindly allow myself a bit of selfpromotion 
As I said yesterday, our paper “Disorder on the landscape” is finally out (by the way, Lubos Motl already has a very nice post about it on his blog).
Read more on 19. Disorder on the landscape: non-technical intro…
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.
7. Newtonian perturbation theory 2 (Inflationary perturbations 2)
This is the 5th post in the series based on my lectures on inflationary perturbations at the University of Helsinki.
Today I will continue to discuss Newtonian perturbation theory (the first post on this topic can be found here). Let me remind you that my ultimate goal is to explain the features (filaments and voids) in the large scale structure of the Universe which appear at scales less than 100 MPcs. Our hypothesis was that these features are due to the intrinsic instability of gravitation, and we started to check this hypothesis in Newtonian perturbation theory.
Read more on 7. Newtonian perturbation theory 2 (Inflationary perturbations 2)…
6. Newtonian perturbation theory 1 (Inflationary perurbations 2)
This is the 4th post in the series based on my lectures on inflationary perturbations at the University of Helsinki.
I decided to postpone the basics for the next time and rush a bit; today instead we will start to develop the theory explaining the large scale sctructure of the Universe as described here. The subject of this post is directly related to patterns in the large scale structure observed at distances less than 100 MPcs.
Read more on 6. Newtonian perturbation theory 1 (Inflationary perurbations 2)…
Loading ...