IQUIST Seminar Series

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The Illinois Quantum Information Science and Technology Center hosts a series of talks about topics related to Quantum Information Sciences in its various forms, including (but not limiting to): Quantum computers, Quantum simulation, Measuring the elusive Majorana fermion, and Photons. Talks will be given by senior researchers as well as students and postdocs. 

IQUIST Seminar: Felix Leditzky "Symmetries and asymptotics of port-based teleportation"

Event Type
Seminar/Symposium
Sponsor
IQUIST and Department of Physics
Location
280 MRL
Date
Sep 25, 2019   1:00 pm  
Speaker
Felix Leditzky, JILA, University of Colorado-Boulder
Contact
Betsy Greifenkamp
E-Mail
greifenk@illinois.edu
Phone
217-333-3022
Views
84

Quantum teleportation is one of the fundamental building blocks of quantum Shannon theory. The original teleportation protocol is an exact protocol and amazingly simple, but it requires a non-trivial correction operation to make it work. Port-based teleportation (PBT) is an approximate variant of teleportation with a simple correction operation that renders the protocol unitarily covariant. This property enables applications such as universal programmable quantum processors, instantaneous non-local quantum computation and attacks on position-based quantum cryptography. The natural symmetries of PBT allow for an elegant mathematical description of optimal protocols in representation-theoretic terms. I will explain these symmetries and show how to use Schur-Weyl duality to describe the asymptotics of optimal port-based teleportation protocols.


This talk is based on arXiv:1809.10751, joint work with M. Christandl, C. Majenz, G. Smith, F. Speelman, and M. Walter.

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