Finite Temperature Quantum Field Theory with Impurities

Details Finite Temperature Quantum Field Theory with Impurities Finite Temperature Quantum Field Theory with Impurities

2004-05-28

arxiv.org/abs/hep-th/0405264v2

J.Stat.Mech.0407:P07001,2004

Physics

High Energy Physics

High Energy Physics - Theory

LaTex, 24 pages, 9 figures, some clarifying comments added

Scientific paper

10.1088/1742-5468/2004/07/P07001

We apply the concept of reflection-transmission (RT) algebra, originally developed in the context of integrable systems in 1+1 space-time dimensions, to the study of finite temperature quantum field theory with impurities in higher dimensions. We consider a scalar field in $(s+1)+1$ space-time dimensions, interacting with impurities localized on $s$-dimensional hyperplanes, but without self-interaction. We discuss first the case $s=0$ and extend afterwards all results to $s>0$. Constructing the Gibbs state over an appropriate RT algebra, we derive the energy density at finite temperature and establish the correction to the Stefan-Boltzmann law generated by the impurity. The contribution of the impurity bound states is taken into account. The charge density profiles for various impurities are also investigated.

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