In using the Maximum Entropy Principle to derive the non-equilibrium steady-state statistical density operator in quantum transport, I've seen the following constraint used to let the(adsbygoogle = window.adsbygoogle || []).push({}); closedquantum system be in steady-state:[H, rh] = 0

I still don't understand the physical significance behind this constraint. Can anybody shed some light on it?

Thanks,

Amr

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# Physical significance behind [H, rho]=0

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