Khriplovich and Lamoreaux (1997, §2) suggest a very interesting argument that CPT provides the correct notion of “complete reversal” in physics. The background assumption is that “complete reversal” should have…

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Detlef Dürr, Shelly Goldstein, and Nino Zanchí once gave a very interesting argument for hidden variables. I’ll give their argument a careful reconstruction. But first, here’s what they say. According…

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In Time and Chance, David Albert writes that since the Schrödinger equation involves a first (instead of a second) derivative, “the dynamical laws that govern the evolutions of quantum states in…

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A well-known particle physicist’s adage: Ever since the fundamental paper of Wigner on the irreducible representations of the Poincaré group, it has been a (perhaps implicit) deﬁnition in physics that an elementary particle…

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In quantum mechanics, certain unitary operators have been understood since the time of Wigner in terms of spacetime symmetries. Why? The foundation for this kind of thinking has an interpretive and…

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