Könyv Functional Renormalization Group for Interacting Bosons Andreas Sinner

Functional Renormalization Group for Interacting Bosons

Application to the symmetry broken phase

Szerző: Andreas Sinner
Nyelv: Német
Kötés: Puha kötésű
Elérhetőség: Beszállítói készleten
Küldés 5-8 napon belül
23 854 Ft
The physics of interacting bosons in the phase with broken symmetry is very different from the physi...

Információk a könyvről

Szerző
Nyelv
Német
Kötés
Könyv - Puha kötésű
Kiadva
2009
oldal
124
EAN
9783838110141
Enbook ID
07091848
Súly
181
Méretek
150 x 220 x 6

Teljes leírás

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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