Functional Renormalization Group for Interacting Bosons

Name: Functional Renormalization Group for Interacting Bosons
Brand: Südwestdeutscher Verlag für Hochschulschriften
SKU: 9783838110141
Price: 335.27 RON
Availability: InStock

Application to the symmetry broken phase

Autor: Andreas Sinner

Limbă:

Legare: Carte broșată

Editura: Südwestdeutscher Verlag für Hochschulschriften

Disponibilitate: În depozitul extern

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335.27 lei

The physics of interacting bosons in the phase with broken symmetry is very different from the physi...

Informații despre carte

Autor

Andreas Sinner

Limbă

germană

Legare

Carte - Carte broșată

Publicat

2009

Pagini

124

EAN

9783838110141

Enbook ID

07091848

Editura

Südwestdeutscher Verlag für Hochschulschriften

Greutate

181

Dimensiuni

150 x 220 x 6

Descriere completă

The physics of interacting bosons in the phase with broken symmetry is very different from the physics in the symmetric phase. The Functional Renormalization Group (FRG) represents a powerful investigation method which allows the description of symmetry breaking with high efficiency. In this book we apply FRG for studying two different models in the broken symmetry phase. In the first part we consider the classical O(1)-model in the vicinity of the second order phase transition. Employing a truncation scheme based on relevance of coupling parameters we study the behavior of the RG-flow which is influenced by the competition between two characteristic lengths of the system. We calculate momentum dependent self-energy and study its dependence on both length scales. In the second part we apply the FRG-formalism to systems of interacting bosons in arbitrary spatial dimensions at zero temperature. We use a truncation scheme based on a non-local potential approximation which satisfy both exact relations postulated by Hugenholtz and Pines, and Nepomnyashchy and Nepomnyashchy. We discuss different scaling regimes and calculate the single-particle spectral density function.

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Functional Renormalization Group for Interacting Bosons

Application to the symmetry broken phase

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Descriere completă

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