Adaptive logarithmic discretization for numerical renormalization group methods

  • Rok Zitko
  • Published 2009 in Computer Physics Communications

Abstract

The problem of the logarithmic discretization of an arbitrary positive function (such as the density of states) is studied in general terms. Logarithmic discretization has arbitrary high resolution around some chosen point (such as Fermi level) and it finds application, for example, in the numerical renormalization group (NRG) approach to quantum impurity… (More)
DOI: 10.1016/j.cpc.2009.02.007

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