ALF

Auxiliary-field quantum Monte Carlo package

In a nutshell

The Algorithms for Lattice Fermions package provides an open-source, high-performance, general code for auxiliary-field quantum Monte Carlo simulations.

Review ALF's defining features in this short Summary.

Download its free, open-source code from its GitLab Repository.

Try out pyALF, the user-friendly ALF's Python interface.

Benefit from our growing repository of additional Hamiltonians.

Get to grips with ALF with the help of its Documentation.

Check over some of the Science made possible by the code.

Be up to date with our Announcements.

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Help us code ALF.

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Latest News

Package reference publication updated

Posted on November 27, 2025 | ALF Collaboration

After some time in the works, ALF’s reference documentation, published in SciPost Physics Codebases has been updated:

ALF Collaboration, The ALF (Algorithms for Lattice Fermions) project release 2.4. Documentation for the auxiliary-field quantum Monte Carlo code. SciPost Phys. Codebases 1-v2.4 (2025). https://doi.org/10.21468/SciPostPhysCodeb.1-v2.4

Notice the current release of the package is ALF 2.6 and we recommend the latest, development version of the code for the latest features and bug fixes.

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