Lindblad trace preservation: Tr(dρ/dt) = 0 from canonical form

Gorini-Kossakowski-Sudarshan 1976 / Lindblad 1976: the most general generator of a completely-positive trace-preserving (CPTP) quantum dynamical semigroup is dρ/dt = −i[H, ρ] + Σ_k (L_k ρ L_k† − ½{L_k†L_k, ρ}), where H is Hermitian…