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SUMMARY:Non-separability does not relieve the problem of Bell's theorem - 
 Joe Henson (Imperial College)
DTSTART:20130425T131500Z
DTEND:20130425T141500Z
UID:TALK44253@talks.cam.ac.uk
CONTACT:William Matthews
DESCRIPTION:Separability is the following ontological principle: completel
 y specifying the physical properties associated to all members of a set of
  regions completely specifies the properties associated to the union of th
 ose regions.  In this talk I will discuss claims that Bell's theorem precl
 udes not all local theories\, but only local\, separable theories.    This
  claim has received much positive attention in the literature on Bell's th
 eorem.  If true\, it would enable the construction of local theories that 
 reproduced the predictions of quantum mechanics\, relieving the puzzlement
  and controversy that has followed the derivation of the famous result wit
 h a relatively minor sacrifice.\n	However\, I will argue that once some ex
 actitude is bought to the discussion\, it can be seen that separability is
  not an implicit assumption of Bell's theorem\, and neither is it necessar
 y for the definition of locality in any relevant sense.  After this clarif
 ication\, I will point out some flaws in previous writings on the subject\
 , and also comment on quotes from Einstein and Bell that supposedly suppor
 t this "loophole".
LOCATION:MR13\, Centre for Mathematical Sciences
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