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- W2999458370 abstract "The renormalization group will be used in this talk 1 as an algorithm to solve strongly coupled quantum field theories without any intention to gain insight into the scale dependence of the dynamics. We shall study the system of nonrelativistic electrons propagating in the presence of static external potential. We consider non-relativistic systems because the comparison with experiment is more direct than in the relativistic domain. The common challenge in both regimes is to trace the polarization effects in the vacuum, i.e. the particle-hole or the particle-anti particle fluctuations in the non-relativistic or relativistic region, respectively. We shall consider two different cases. First, the electrons will be placed in an external localized field and one finds a problem with inhomogeneous ground state, characteristic of Atomic Physics . Second, we assume the presence of a static random external impurity potential which obeys a Gaussian probability distribution and we introduce a scheme to compute the quenched averages of kinetic transport coefficients in a translation invariant manner. The common technics applied is a generalization of the functional renormalization group [1] where the role of the running cut-off is played by an arbitrary control parameter which generates differentiable changes in the dynamics." @default.
- W2999458370 created "2020-01-23" @default.
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- W2999458370 date "2002-03-01" @default.
- W2999458370 modified "2023-10-16" @default.
- W2999458370 title "Internal Space Renormalization Group Methods for Atomic and Condensed Matter Physics" @default.
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