The status of determinism in noncontextual models of quantum theory Speaker(s): Robert Spekkens
Abstract: In an ontological model of quantum theory that is Belllocal, one can assume without loss of generality that the outcomes of measurements are determined deterministically by the ontic states (i.e. the values of the local hidden variables). The question I address in this talk is whether such determinism can always be assumed in a noncontextual ontological model of quantum theory, in particular whether it can be assumed for nonprojective measurements. While it is true that one can always represent a measurement by a deterministic response function by incorporating ancillary degrees of freedom into one's description (for instance those of the apparatus), I show that in moving to such a representation, one typically loses the warrant to apply the assumption of measurement noncontextuality. The implications for experimental tests of measurement noncontextuality will be discussed.
Date: 02/12/2010  3:30 pm
Collection: PIAF Workshop Brisbane  2010
