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## Main Question or Discussion Point

If ρ is the desity operator of a ensemble.

We get (ih/2π) ∂ρ/∂ t = [H,ρ ].

for a stationary state [H,ρ ]=0 . So H and ρ can share the same eigenvectors. Can someone explain what does this mean?

We get (ih/2π) ∂ρ/∂ t = [H,ρ ].

for a stationary state [H,ρ ]=0 . So H and ρ can share the same eigenvectors. Can someone explain what does this mean?