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"adapt" logarithmic discretization solver

"adapt" solves the differential equations which determine logarithmic discretization coefficients in the form

ε(x) = g(x) Λ^(2-x),

Ε(x) = f(x) Λ^(2-x),

where ε(x) are the discretization mesh points and Ε(x) the representative energies, while x=j+z is the mesh parameter which combines the discretization interval number j=1,2,3,.. and the twist parameter z in the interval [0:1]. For more details consult

Rok Zitko: "Adaptive logarithmic discretization for numerical renormalization group methods", Comp. Phys. Commun. (2009).
Rok Zitko, Thomas Pruschke: "Energy resolution and discretization artefacts in the numerical renormalization group", Phys. Rev. B 79, 085106 (2009).

The package also contains a tridiagonalisation code for calculating the coefficients for the Wilson chain (hopping constants and on-site energies). This code requires the GNU MP library.

Download full package (20.03.2009) (README file)

Last modified: 20. 3. 2009 Request more information Rok Zitko's home page