[gf<retime>] Real time
This is a specialisation of gf and views for imaginary Matsubara frequencies.
Synopsis
gf<retime, Target, Opt>
The Target template parameter can take the following values:
Target |
Meaning |
---|---|
scalar_valued |
The function is scalar valued (double, complex…). |
matrix_valued [default] |
The function is matrix valued. |
Domain & mesh
Singularity
The singularity is a high frequency expansion, High-Frequency moments of the Green’s function.
Evaluation method
Linear interpolation on the mesh.
Return type:
If Target==scalar_valued: a complex
If Target==matrix_valued: an object modeling ImmutableMatrix concept.
When the point is outside of the mesh, the evaluation of the gf returns:
the evaluation of the high frequency tail
Data storage
If Target==scalar_valued :
data_t: 1d array of complex<double>.
g.data()(i) is the value of g for the i-th point of the mesh.
If Target==matrix_valued :
data_t: 3d array (C ordered) of complex<double>.
g.data()(i, range(), range()) is the value of g for the i-th point of the mesh.
HDF5 storage convention
h5 tag: ReTime
Examples
#include <triqs/gfs.hpp>
#include <triqs/mesh.hpp>
using namespace triqs::gfs;
using namespace triqs::mesh;
int main() {
double tmin = 0, tmax = 10; // the time interval
auto n_times = 100; // we will have 100 points
// we want a 2x2 matrix-valued Green function
auto g = gf<retime>{{tmin, tmax, n_times}, {2, 2}};
};