Wanted Dead or Alive: Two Attempts to Solve Schrodinger's Paradox

We discuss two recent attempts two solve Schrodinger's cat paradox. One is the modal interpretation developed by Kochen, Healey, Dieks, and van Fraassen. It allows for an observable which pertains to a system to possess a value even when the system is not in an eigenstate of that observable. The other is a recent theory of the collapse of the wave function due to Ghirardi, Rimini, and Weber. It posits a dynamics which has the effect of collapsing the state of macroscopic systems. We argue that the modal interpretation cannot account for non-accurate measurements and that both accounts have the consequence that in ordinary measurement situations (including the situation of Schrodinger's cat) the observables that ends up well defined are not quite the ones that we want to be well defined.
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    Olimpia Lombardi & Mario Castagnino (2008). A Modal-Hamiltonian Interpretation of Quantum Mechanics. Studies in History and Philosophy of Science Part B 39 (2):380-443.
    Jeremy Butterfield (1993). Interpretation and Identity in Quantum Theory. Studies in History and Philosophy of Science 24 (3):443--76.
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