@thesis{4735,
  title = {Variationsverfahren zur Untersuchung von
  Grundzustandseigenschaften des Ein-Band Hubbard-Modells},
  abstract = {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.},
  degree_type = {Diplom},
  institution = {Technische Universität Dresden, Dresden/Germany},
  school = {Biologische Kybernetik},
  month = may,
  year = {2001},
  author = {Eichhorn, J.},
  month_numeric = {5}
}