Schwinger-Keldysh conjugation relation
= Schwinger-Keldysh conjugation relation
{c}
For real couplings and real external data, reflection of every contour label complex conjugates an in-in diagram: $B_{LL}=B_{RR}^*$ and $B_{RL}=B_{LR}^*$.
= Schwinger-Keldysh conjugation relation
{c}
For real couplings and real external data, reflection of every contour label complex conjugates an in-in diagram: $B_{LL}=B_{RR}^*$ and $B_{RL}=B_{LR}^*$.