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SUMMARY:Entropy in general physical theories - Tony Short (CQC)
DTSTART:20100211T141500Z
DTEND:20100211T151500Z
UID:TALK22998@talks.cam.ac.uk
CONTACT:Jonathan
DESCRIPTION:Quantifying information and uncertainty in terms of entropies 
 has proved invaluable in our understanding of classical and quantum inform
 ation theory. But can these concepts be extended to other physical theorie
 s? Here we consider a general definition of entropy for any physical theor
 y\, which reduces to the Shannon and Von-Neumann entropy in the classical 
 and quantum case. We examine the properties and limitations of this quanti
 ty\, with particular attention to `box world'\, a hypothetical physical th
 eory in which all non-signalling correlations exist. 
LOCATION:MR15\, Centre for Mathematical Sciences
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