Latest version: qgraf-3.4.2 (April 2019).
Please report any error you may happen to find.
Programming language: Fortran (mostly
Fortran77; valid Fortran 95 syntax, though).
Binaries/executables are not distributed, the program has to be compiled and linked;
compiling with GNU's gfortran should be straightforward, eg there should be no need
to specify a Fortran standard.
The features added since the release of qgraf-3.1.5 include:
option “onshellx”, an extended form of “onshell” (3.2);
improved treatment of duplicate vertices (3.3);
a way of restricting the configuration of external lines (3.3);
the ability to require/disallow bridge-type propagators with certain momenta (3.3);
an option to select diagrams with non-factorizable cycle spaces (3.4);
an option to select 1-vertex irreducible diagrams (3.4).
Current plans: qgraf-3.4 should be the next ‘stable’ version (ie available for a long
period, minimal fixes as need be), hopefully replacing qgraf-3.1 in that regard.
The next release is unlikely to be available before 2020; plans include generation
of counterterm diagrams.
The diagram generation is based on the method described in the following article:
Automatic Feynman graph generation
J. Comput. Phys. 105 (1993) 279-289