Exchange for solids
Description
This merge request allows for running Hartree-Fock and hybrid calculations for solids. At the moment only the unscreened Coulomb potential is supported. The singularity of the Coulomb potential is properly used. This is part of a larger effort to implement robust and efficient hybrid functionals calculations in Octopus.
News snippet
This merge request allows for running Hartree-Fock and hybrid calculations for solids.
Checklist
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I have checked that my code follows the Octopus coding standards -
I have added tests for all the new features added in this request.