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https://github.com/triqs/dft_tools
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579368f24b
- lazy_fourier and co --> fourier - ex fourier --> make_gf_from_fourier to make a new gf - = fourier (g) works only iif lhs is a view, like scalar. - updated python (commented fourier method).
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
#define TRIQS_ARRAYS_ENFORCE_BOUNDCHECK
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#include <triqs/gfs.hpp>
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#include <triqs/gfs/product.hpp>
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#include <triqs/gfs/curry.hpp>
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#include <triqs/gfs/local/fourier_real.hpp>
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#include <triqs/gfs/local/fourier_matsubara.hpp>
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#include <triqs/arrays.hpp>
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using namespace triqs::gfs;
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int main() {
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try {
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double beta =1.;
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double tmin=0.;
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double tmax=10;
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double wmin=0.;
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double wmax=1.0;
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int n_re_freq=100;
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int n_im_freq=100;
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int Nt=100;
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triqs::clef::placeholder<0> w_;
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triqs::clef::placeholder<1> wn_;
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triqs::clef::placeholder<2> tau_;
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auto G_w_wn = gf<cartesian_product<refreq,refreq>, scalar_valued>( {gf_mesh<refreq>(wmin, wmax, n_re_freq), gf_mesh<refreq>(wmin, wmax, n_re_freq)});
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auto G_w_tau = gf<cartesian_product<refreq,retime>, scalar_valued>( {gf_mesh<refreq>(wmin, wmax, n_re_freq), gf_mesh<retime>(-tmax, tmax, Nt)});
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G_w_wn(w_,wn_)<<1/(wn_-1)/( pow(w_,3) );
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G_w_tau(w_,tau_)<< exp( -2*tau_ ) / (w_*w_ + 1 );
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auto G_w_wn_curry0 = curry<0>(G_w_wn);
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auto G_w_tau_curry0 = curry<0>(G_w_tau);
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for (auto const & w : G_w_wn_curry0.mesh()) G_w_wn_curry0[w] = fourier(G_w_tau_curry0[w]);
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G_w_wn_curry0[w_] << fourier(G_w_tau_curry0[w_]);
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curry<0>(G_w_wn) [w_] << fourier(curry<0>(G_w_tau)[w_]);
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}
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// temp fix : THE TEST DOES NOT RUN !!
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//TRIQS_CATCH_AND_ABORT;
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catch(std::exception const & e ) { std::cout << "error "<< e.what()<< std::endl;}
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}
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