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dft_tools/triqs/gfs/local/fourier_lattice.hpp
Olivier Parcollet 0a1285405c [gfs] Lattice fourier, multivar G, curry, tail
- Add Fourier for lattice.
  - Add regular_bz_mesh, cyclic_lattice, and their FFT.

- rm freq_infty.
- The gf can now be evaluated on a tail_view, which result in composing the tail.
- Fix the following issue :
  g(om_) << g(om_ +1)
  will recompose the tail correctly.
- TODO : TEST THIS NEW FEATURE IN DETAIL.

- Work on singularity for G(x, omega)

 - Separate the factory for singularity from the data factory in gf.
 - overload assign_from_functoin (renamed).
 - Fix singularity_t and co in the gf (const issue).

- Clean tail, add tail_const_view
 - add m_tail for x -> tail on any mesh
 - test curry + fourier works on k
2014-10-18 21:20:35 +02:00

49 lines
1.9 KiB
C++

/*******************************************************************************
*
* TRIQS: a Toolbox for Research in Interacting Quantum Systems
*
* Copyright (C) 2014 by O. Parcollet
*
* TRIQS is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* TRIQS. If not, see <http://www.gnu.org/licenses/>.
*
******************************************************************************/
#pragma once
#include "fourier_base.hpp"
#include <triqs/gfs/bz.hpp>
#include <triqs/gfs/cyclic_lattice.hpp>
namespace triqs {
namespace gfs {
template <typename Target, typename Singularity, typename Opt, bool V, bool C>
gf_keeper<tags::fourier, cyclic_lattice, Target, Singularity>
fourier(gf_impl<cyclic_lattice, Target, Singularity, Opt, V, C> const& g) {
return {g};
}
template <typename Target, typename Singularity, typename Opt, bool V, bool C>
gf_keeper<tags::fourier, bz, Target, Singularity> inverse_fourier(gf_impl<bz, Target, Singularity, Opt, V, C> const& g) {
return {g};
}
// implementation
void _fourier_impl(gf_view<bz, scalar_valued> gk, gf_const_view<cyclic_lattice, scalar_valued> gr);
void _fourier_impl(gf_view<bz, matrix_valued> gk, gf_const_view<cyclic_lattice, matrix_valued> gr);
void _fourier_impl(gf_view<cyclic_lattice, scalar_valued> gr, gf_const_view<bz, scalar_valued> gk);
void _fourier_impl(gf_view<cyclic_lattice, matrix_valued> gr, gf_const_view<bz, matrix_valued> gk);
}}