get_ret() [1/4]

template<typename T >

void get_ret ( const int  i, const int  j, std::complex< T > &  G_ret, herm_matrix_timestep_view< T > &  G, herm_matrix_timestep_view< T > &  Gcc  )

inline

Returns the retarded component of a general contour function at given times.

Purpose

Returns the retarded component \( G^\mathrm{R}(t_i,t_j) \) at given times \( t_i\) and \( t_j\). We assume \(G^\mathrm{R}(t_i,t_j)\) can be analytically continued to \( j > i\), for which the hermitian conjugate \(G^\ddagger\) is used.

Parameters

i	[int] Index of time \( t_i\) .
j	[int] Index of time \( t_j\) .
G_ret	[complex<T>] The retarded component (scalar GF).
G	[herm_matrix_timestep_view] Contour function G
Gcc	[herm_matrix_timestep_view] Hermitian conjugate \(G^\ddagger\) of \(G\).

Definition at line 252 of file cntr_getset_herm_matrix_timestep_view_inc.hpp.

Referenced by get_gtr(), and get_ret().

                                      {
    assert(i <= G.tstp() && j <= G.tstp());
    assert(i == G.tstp() || j == G.tstp());
    assert(i <= Gcc.tstp() && j <= Gcc.tstp());
    assert(i == Gcc.tstp() || j == Gcc.tstp());
    assert(G.tstp() == Gcc.tstp());
    assert(G.ntau() == Gcc.ntau());
    assert(G.size1() == Gcc.size1());
    assert(G.size2() == Gcc.size2());
    assert(G.sig() == Gcc.sig());

    if (G.tstp() == i){
        G_ret = *G.retptr(j);
    } else if (G.tstp() == j) {
        G_ret = *Gcc.retptr(i);
        G_ret = -std::conj(G_ret);
    }
}

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