Adding support for complex-to-complex FFT in the Poisson solver
Description
Adding support for complex-to-complex FFT in the Poisson solver. The two-body integrals and related exchange integrals are now computed using a dedicated Poisson solver that belongs to the exchange operator.
This is part of !555 (closed) .
News snippet
Adding support for complex-to-complex FFT in the Poisson solver.
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.
Edited by Martin Lueders