NESSi  v1.0.2
The NonEquilibrium Systems Simulation Library

◆ get_les() [9/12]

template<typename T >
void cntr::get_les ( const int  i,
const int  j,
std::complex< T > &  G_les,
herm_matrix_timestep_view< T > &  G,
herm_matrix_timestep_view< T > &  Gcc 
)
inline

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

Purpose

Returns the lesser component \( G^<(t_i,t_j) \) at given times \( t_i\) and \( t_j\). For \( i > j\) the hermitian conjugate \(G^\ddagger\) is used.

Parameters
i

[int] Index of time \( t_i\) .

j

[int] Index of time \( t_j\) .

G_les

[complex<T>] The lesser 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 154 of file cntr_getset_herm_matrix_timestep_view_inc.hpp.

Referenced by get_gtr(), and get_les().

155  {
156  assert(i <= G.tstp() && j <= G.tstp());
157  assert(i == G.tstp() || j == G.tstp());
158  assert(i <= Gcc.tstp() && j <= Gcc.tstp());
159  assert(i == Gcc.tstp() || j == Gcc.tstp());
160  assert(G.tstp() == Gcc.tstp());
161  assert(G.ntau() == Gcc.ntau());
162  assert(G.size1() == Gcc.size1());
163  assert(G.size2() == Gcc.size2());
164  assert(G.sig() == Gcc.sig());
165 
166  if (G.tstp() == j){
167  G_les = *G.lesptr(i);
168  } else if (G.tstp() == i) {
169  G_les = *Gcc.lesptr(j);
170  G_les = -std::conj(G_les);
171  }
172 }
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