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    • Non-perturbative flow equations from continuous unitary transformations 

      Kriel, Johannes Nicolaas (Stellenbosch : University of Stellenbosch, 2005-12)
      The goal of this thesis is the development and implementation of a non-perturbative solution method for Wegner’s flow equations. We show that a parameterization of the flowing Hamiltonian in terms of a scalar function ...