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SUMMARY:Entanglement can increase asymptotic rates of zero-error classical
  communication over classical channels - William Matthews (IQC\, Waterloo)
DTSTART:20100921T130000Z
DTEND:20100921T140000Z
UID:TALK26400@talks.cam.ac.uk
CONTACT:Ashley Montanaro
DESCRIPTION:It is known that the number of different classical messages wh
 ich can be communicated with a single use of a classical channel with zero
  probability of decoding error can sometimes be increased by using entangl
 ement shared between sender and receiver. It has been an open question to 
 determine whether entanglement can ever offer an advantage in terms of the
  zero-error communication rates achievable in the limit of many channel us
 es. In this paper we show\, by explicit examples\, that entanglement can i
 ndeed increase asymptotic zero-error capacity. Interestingly\, in our exam
 ples the quantum protocols are based on the root systems of the exceptiona
 l Lie groups E7 and E8. 
LOCATION:MR14\, Centre for Mathematical Sciences
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