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SUMMARY:Quantum linear network coding for entanglement distribution in res
 tricted architectures - Steven Herbert
DTSTART:20200227T141500Z
DTEND:20200227T151500Z
UID:TALK139300@talks.cam.ac.uk
CONTACT:Johannes Bausch
DESCRIPTION:In this talk I’ll present our recent paper on quantum linear
  network coding (arXiv 1910.03315). Our results build on previous work sho
 wing that linear network coding protocols can be applied to the problem of
  entanglement distribution over quantum networks – in particular distrib
 uting Bell pairs between pairs of “transmitter” and “receiver” nod
 es. We noticed two important features – that such quantum linear network
  coding (QLNC) protocols can be executed when each node is a single qubit\
 , and that classical control can be used to perform the protocols “out o
 f order” – which motivated our main result: that if a linear network c
 ode exists\, then it is possible to distribute entanglement with a quantum
  circuit of constant depth. To prove this result\, we proposed a formalism
  that we term the QLNC formalism\, which helps us to reason about QLNC cir
 cuits in general.
LOCATION:MR21\, Centre for Mathematical Sciences\, Wilberforce Road\, Camb
 ridge
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