Dear quanta,
We will have a talk tomorrow at 11am by David Ding from Stanford in room
6-310.
Title: A Quantum Multiparty Packing Lemma and the Relay Channel
Abstract: Encoding classical information into a quantum system is one of
the most fundamental questions of quantum information theory. Classic
results in this area include the Holevo bound and the
Holevo-Schumacher-Westmoreland theorem. The setup can be imagined as a
black box which takes a random variable encoding the information as input
and outputs a quantum state. Under appropriate conditions, the information
can be retrieved via a decoding quantum measurement. In this work, we prove
that decoders for different black boxes can be combined into one
simultaneous decoder for a black box that takes as input the joint random
variable across all the black boxes. This resolves a long-standing open
problem in quantum network information theory known as simultaneous
decoding and was made possible by Pranab Sen's recent quantum joint
typicality lemma. We demonstrate the use of our results for the quantum
relay channel, a possible communication model for quantum repeaters.
_______________________________________________
qip mailing list
qip(a)mit.edu
http://mailman.mit.edu/mailman/listinfo/qip