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




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.

Author(s): Eichhorn, J.
Year: 2001
Month: May
Day: 15

Department(s): Empirical Inference
Bibtex Type: Thesis (thesis)

School: Biologische Kybernetik

Degree Type: Diplom
Digital: 0
Institution: Technische Universität Dresden, Dresden/Germany
Language: de

Links: PostScript


  title = {Variationsverfahren zur Untersuchung von
  Grundzustandseigenschaften des Ein-Band Hubbard-Modells},
  author = {Eichhorn, J.},
  institution = {Technische Universität Dresden, Dresden/Germany},
  school = {Biologische Kybernetik},
  month = may,
  year = {2001},
  month_numeric = {5}