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SUMMARY:Superluminality and predictability - Harvey Reall\, DAMTP
DTSTART:20180131T141500Z
DTEND:20180131T151500Z
UID:TALK97381@talks.cam.ac.uk
CONTACT:David Marsh
DESCRIPTION:It is sometimes claimed that Lorentz covariant classical theor
 ies which allow superluminal propagation of signals are unviable because o
 ne can “violate causality” in such a theory by "building a time machin
 e". I will explain why such claims are unconvincing. I will then discuss a
  certain theory that can be formulated in either a superluminal or a sublu
 minal form. It turns out that there is a sense in which the superluminal v
 ersion is more predictive than the subluminal version. I will present theo
 rems explaining why this is true more generally.
LOCATION:MR2\, Centre for Mathematical Sciences
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