Authors: | Krones, Jörn |
Title: | Effective models for the single impurity Anderson and Kondo model from continuous unitary transformations |
Language (ISO): | en |
Abstract: | The method of continuous unitary transformations (CUTs) is applied to the Anderson impurity and the Kondo model aiming at the systematic derivation of convergent e ective models. If CUTs are applied in a conventional way, diverging di erential equations occur. Similar to poor mans scaling the energy scale, below which the couplings diverge, corresponds to the Kondo temperature TK. We present a way to apply CUTs to the Kondo and to the Anderson impurity model so that no divergences occur but a converged e ective low-energy model is derived with small nite parameters at arbitrarily small energies. The ground state corresponds to a bound singlet with a binding energy given by the Kondo temperature TK. |
Subject Headings: | Continuous unitary transformations CUT Flow equation Kondo effect Kondo model Anderson impurity model Effective models |
Subject Headings (RSWK): | Supraleitung Kondo-Effekt |
URI: | http://hdl.handle.net/2003/33785 http://dx.doi.org/10.17877/DE290R-6863 |
Issue Date: | 2014 |
Appears in Collections: | Theoretische Physik I |
Files in This Item:
File | Description | Size | Format | |
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Dissertation.pdf | DNB | 43.86 MB | Adobe PDF | View/Open |
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