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Abstract
The aim of this paper is to analyze the concepts of time-reversal invariance and irreversibility in the so-called 'time-asymmetric quantum mechanics'. We begin with pointing out the difference between these two concepts. On this basis, we show that irreversibility is not as tightly linked to the semigroup evolution laws of the theory -which lead to its non time-reversal invariance- as usually suggested. In turn, we argue that the irreversible evolutions described by the theory are coarse-grained processes.
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What Time Reversal Invariance is and Why It Matters.John Earman - 2002 - International Studies in the Philosophy of Science 16 (3):245 – 264.
Nonequilibrium Statistical Mechanics Brussels–Austin Style.Robert C. Bishop - 2004 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 35 (1):1-30.
La Nouvelle Alliance.I. Prigogine - 1977 - Scientia 71 (112):287.

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