72.15.Qm Scattering mechanisms and Kondo effect (see also 75.20.Hr Local moments in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions in magnetic properties and materials)
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- 2010 (1)
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- Doctoral Thesis (1)
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- Anderson Impurity model (1)
- Anderson-Modell (1)
- Anregung (1)
- Bosonisierung (1)
- Dynamischer Strukturfaktor (1)
- Excitation (1)
- Fermions (1)
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- Luttinger-Flüssigkeit (1)
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In this thesis, we study the properties of excitations in the systems of interacting fermions. These excitations can be bosonic such as collective modes which we handle in the first part of this thesis or fermionic like quasi particles and quasi holes. One of the important points, to investigate the excitations is their damping which corresponds to their life-time in the system. This thesis consists of two parts, where in both parts, we use the field-theoretical methods to examine the problem.