Spectral functions of low-dimensional quantum systems

Göttingen, Univ., Diss., 2012

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Bibliographische Detailangaben
1. Verfasser:	Dargel, Piet (VerfasserIn)
Weitere Verfasser:	Pruschke, Thomas (BerichterstatterIn), Noack, Reinhard (BerichterstatterIn)
Format:	UnknownFormat
Sprache:	eng
Veröffentlicht:	2012
Schlagworte:	Hochschulschrift
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Beschreibung
Zusammenfassung:	Göttingen, Univ., Diss., 2012 The focus of this thesis is set on the calculation of spectral functions for low-dimensional quantum systems. At first the quantum many-body problem is introduced and the related spectral functions of interest are defined. In a next step the applied numerical algorithms are presented: Exact diagonalization & Lanczos algorithm, the numerical renormalization group (NRG) and the density matrix renormalization group (DMRG) in the formulation of matrix product states (MPS). The main focus is set on the calculation of spectral functions with these algorithms. In particular for the DMRG a new algo...
Beschreibung:	X, 102, XXX S.