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Carte Stochastic Cosmological Inflation Florian Kühnel

Stochastic Cosmological Inflation

A Replica Field-Theoretical Study

Autor: Florian Kühnel
Limbă: engleză
Legare: Carte broșată
Editura: Sudwestdeutscher Verlag Fur Hochschulschriften AG
Disponibilitate: În depozitul extern
Expediem în 8-11 zile
334.18 lei
In this thesis we apply methods from statistical physics to stochastic inflation. Those methods, the...

Informații despre carte

Autor
Florian Kühnel
Limbă
engleză
Legare
Carte - Carte broșată
Publicat
2012
Pagini
128
EAN
9783838132501
ISBN
3838132505
Enbook ID
06989038
Editura
Sudwestdeutscher Verlag Fur Hochschulschriften AG
Greutate
200
Dimensiuni
152 x 229 x 9

Descriere completă

In this thesis we apply methods from statistical physics to stochastic inflation. Those methods, the replica field theory and the Gaussian variational methods, have to our knowledge never been applied before in this context, and allow us to compute the power spectrum of a scalar test field in the most general set-up. It provides a framework to perform calculations in regions of arbitrarily large quantum fluctuations and may also serve as a starting point to address the issue of back reaction. After an introduction to cosmological inflation, cosmological perturbation theory and cosmic microwave background anisotropies, we explain the idea of stochastic inflation. This is followed by an introduction to replica field theory. Our work continues with a detailed calculation of the power spectrum of a scalar test field in a Friedmann Universe. We elaborate on the effect of quantum fluctuations on the spectrum and derive explicit expressions showing its dependence on time and other important parameters. The effect of self-interactions and possible effects on the cosmic microwave background are discussed. We conclude with a summary of our results and give an outlook.