Schrödinger’s Reaction to the EPR Paper

Abstract

I discuss Schrodinger’s response to the Einstein-Podolsky-Rosen (EPR) paper of 1935. In particular, it is argued, based on an unpublished notebook, that while Schrodinger sympathized with the EPR argument he worried about its lack of emphasis on the role of biorthogonal expansions and on the distinction between conclusions dependent on the particular outcome obtained in a single measurement, versus those that quantify over all possible outcomes of a measurement procedure. I also discuss the different views between Schrodinger and Einstein on the issue of the completeness of quantum mechanics. Finally, I discuss the question whether Schrodinger borrowed from his correspondence with Einstein to come up with his famous Cat Paradox.