Time symmetry in microphysics

Philosophy of Science 64 (4):244 (1997)
Physics takes for granted that interacting physical systems with no common history are independent, before their interaction. This principle is time-asymmetric, for no such restriction applies to systems with no common future, after an interaction. The time-asymmetry is normally attributed to boundary conditions. I argue that there are two distinct independence principles of this kind at work in contemporary physics, one of which cannot be attributed to boundary conditions, and therefore conflicts with the assumed T (or CPT) symmetry of microphysics. I note that this may have interesting ramifications in quantum mechanics.
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DOI 10.1086/392603
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Huw Price (2012). Does Time-Symmetry Imply Retrocausality? How the Quantum World Says “Maybe”? Studies in History and Philosophy of Science Part B 43 (2):75-83.
Aspasia S. Moue (2008). The Thought Experiment of Maxwell's Demon and the Origin of Irreversibility. Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 39 (1):69 - 84.

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