.. _zoo_questaal:

********
QUESTAAL
********

========= ======================================================================
========= ======================================================================
Status    Draft
Links     `DOI <https://doi.org/10.1016/j.cpc.2019.107065>`_
Languages Fortran
========= ======================================================================

Spin Hamiltonian
================ 

.. math::

    \mathcal{H}
    =
    -\sum_{ij}
    J_{ij}
    \,
    \mathbf{e}_i
    \cdot
    \mathbf{e}_j

Convention
==========

================= ===
================= ===
Spin normalized   yes
Multiple counting yes
================= ===