Variationsverfahren zur Untersuchung von Grundzustandseigenschaften des 
Ein-Band Hubbard-Modells

Eichhorn, J

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Variationsverfahren zur Untersuchung von Grundzustandseigenschaften des Ein-Band Hubbard-Modells

Eichhorn, J. (2001). Variationsverfahren zur Untersuchung von Grundzustandseigenschaften des Ein-Band Hubbard-Modells. Diploma Thesis, Technische Universität Dresden, Dresden, Germany.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-E282-2 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-AE60-B

Genre: Hochschulschrift

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Urheber:
Eichhorn, J¹, Autor

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1External Organizations, ou_persistent22

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Zusammenfassung: Using different modifications of a new variational approach, statical
groundstate properties of the one-band Hubbard model such as energy
and staggered magnetisation are calculated. By taking into account
additional fluctuations, the method ist gradually improved so that a
very good description of the energy in one and two dimensions can be
achieved. After a detailed discussion of the application in one dimension, extensions for two dimensions are introduced. By use of a modified
version of the variational ansatz in particular a description of the
quantum phase transition for the magnetisation should be possible.