mirror of
https://github.com/triqs/dft_tools
synced 2024-11-01 03:33:50 +01:00
e1c113b745
- evaluator - G(k,tau) is real - partial_eval for matrix_valued functions - details : simplifying traits (using decay_t)
76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
#define TRIQS_ARRAYS_ENFORCE_BOUNDCHECK
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#include <triqs/gfs.hpp>
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#include <triqs/gfs/bz.hpp>
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// FAIRE make_value !!
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//
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using namespace triqs::gfs;
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using namespace triqs::clef;
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using namespace triqs::arrays;
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using namespace triqs::lattice;
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template <typename Function, typename Mesh>
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// requires ( is_function_on_mesh<Function,Mesh>())
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auto sum(Function const &f, Mesh const &m) ->decltype(make_matrix(0*f(*(m.begin())))) {
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//auto sum(Function const &f, Mesh const &m) {
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//auto res = typename triqs::regular_type_if_exists_else_type<decltype(f(typename Mesh::mesh_point_t{}))>::type (f(m.begin()));
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auto res = make_matrix(0*f(*(m.begin())));
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for (auto const &x : m) res = res + f(x);
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return res;
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}
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namespace triqs {
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namespace clef {
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TRIQS_CLEF_MAKE_FNT_LAZY(sum);
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TRIQS_CLEF_MAKE_FNT_LAZY(conj);
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}
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}
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#define TEST(...) std::cout << BOOST_PP_STRINGIZE((__VA_ARGS__)) << " ---> " << (__VA_ARGS__) << std::endl << std::endl;
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int main() {
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try {
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double beta = 1;
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auto bz_ = brillouin_zone{bravais_lattice{make_unit_matrix<double>(2)}};
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auto g_eps = gf<bz>{{bz_, 20}, {1, 1}};
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auto G_k_iom = gf<cartesian_product<bz, imfreq>>{{{bz_, 20}, {beta, Fermion, 100}}, {1, 1}};
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// try to assign to expression
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placeholder<0> k_;
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placeholder<1> w_;
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auto eps = make_expr( [](k_t const& k) { return -2 * (cos(k(0)) + cos(k(1))); }) ;
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G_k_iom(k_, w_) << 1 / (w_ - eps(k_));
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auto G_loc = gf<imfreq, matrix_valued, no_tail>{{beta, Fermion, 100}, {1, 1}};
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auto r = G_k_iom(k_t{0, 0}, matsubara_freq{0, beta, Fermion});
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auto r5 = sum(k_ >> G_k_iom(k_,0), g_eps.mesh());
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G_loc(w_) << sum(k_ >> G_k_iom(k_,w_), g_eps.mesh());
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TEST(G_loc(0));
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auto G_k_tau = gf<cartesian_product<bz, imtime>>{{{bz_, 20}, {beta, Fermion, 100}}, {1, 1}};
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//auto r3 = partial_eval<0>(G_k_iom,0);
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//auto r4 = partial_eval<0>(G_k_tau,0);
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//auto gt = curry<0>(G_k_tau) [0];
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//auto gw = curry<0>(G_k_iom)[0];
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//curry<0>(G_k_tau) [k_] << inverse_fourier(curry<0>(G_k_iom)[k_]);
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//TEST(G_k_tau[{0,0}]);
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// hdf5
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//H5::H5File file("ess_g_k_om.h5", H5F_ACC_TRUNC );
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//h5_write(file, "g", G);
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}
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TRIQS_CATCH_AND_ABORT;
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}
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