Maxwell demon. Even equilibrium fluctuations always produce an energy imbalance (for shure when the particle number is odd) both in classic and Q mechanics, they are both time reversible. Szilard-Landauer introduce information in the game because that could change the probability of the imbalance through a non-equilibrium (finite memory) Maxwell demon, an engine with an energy source, a power as small as we like. I am not pretending all is clear but irreversibility doesn't look to me the explanation.
Maxwell demon. Even equilibrium fluctuations always produce an energy imbalance (for shure when the particle number is odd) both in classic and Q mechanics, they are both time reversible. Szilard-Landauer introduce information in the game because that could change the probability of the imbalance through a non-equilibrium (finite memory) Maxwell demon, an engine with an energy source, a power as small as we like. I am not pretending all is clear but irreversibility doesn't look to me the explanation.