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Latest version: qgraf-3.6.7 (2023-Dec)
Please report any error you may happen to find. -
Programming language(s): Fortran 2008 (starting withqgraf-3.5 ), Fortran 77 (for earlier versions).
Binaries/executables are not distributed, the program has to be compiled and linked. Employing GNU Fortran for that task should be straightforward (see eg fileqgraf-3.6.7.pdf ). There are binary/executable versions of GFortran for several operating systems, as described in the GFortranBinaries webpage. -
The
features added in the last two versions include (eg):
inputing simple command-line arguments (3.5 );
generating more than one type of output-file in the same run (3.5 );
a more generalloops statement (3.6 );
an extended language for describing input models (3.6 );
thepartition statement (3.6 ). -
Current plans: version3.4 should be available and supported for some time yet (minimal fixes as need be), and version3.6 is now stable too; the next version is somewhat late, the current estimate for the release of a preliminary version is early May. -
Notice: for better future-proofing, packages that try to download this program should do so by using the URL that includes thelinks/ directory (as described in any recent manual, section ‘Automatic downloads’ or similar title), or at least using it as an alternative URL.
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Automatic Feynman graph generation
J. Comput. Phys. 105 (1993) 279–289
https://doi.org/ 10.1006/jcph.1993.1074
This other paper shows that the diagram generation with explicitly mixed propagators can be reduced to the usual one.
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Feynman graph generation and propagator mixing, I
Comput. Phys. Commun. 269 (2021) 108103
https://doi.org/ 10.1016/j.cpc.2021.108103