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Future measurements affect possible "elements of reality"

  1. Jul 31, 2014 #1


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    Here is a fun talk by Lev Vaidman wherein he concludes that "future measurements affect possible sets of 'elements of reality'." He writes on one of his slides, "I define that there is an element of reality at time t for an observable C, "C = c," when it can be inferred with certainty that the result of a measurement of C, if performed, is c."

    His talk was delivered this month at a conference on retrocausality hosted by Huw Price.

    He shows results of an experiment in which he embeds an interferometer inside an interferometer. His measurement results indicate (watch and see if you agree) that it is possible for an element of reality (a photon) to exist in the embedded interferometer, but not along any path entering or leaving the embedded interferometer.
    Last edited by a moderator: Sep 25, 2014
  2. jcsd
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