002: Quantum channel capacities with Debbie Leung
12/18/20 • 63 min
Quantum channel capacities are known to exhibit counterintuitive properties (superadditivity and superactivation), which make them hard to calculate. In this episode we talk to Debbie Leung (Institute for Quantum Computing, University of Waterloo) about one of her favourite open problems, the capacity of the qubit depolarizing channel, as well as her 2017 paper with Felix Leditzky and Graeme Smith that makes some progress on this problem.
Hosts: Vincent Russo (vprusso.github.io), William Slofstra (elliptic.space), Henry Yuen (henryyuen.net)
Debbie's paper: https://doi.org/10.1103/PhysRevLett.120.160503
Beyond IID in Information Theory: https://sites.google.com/view/beyondiid8/
Link to Debbie's course on quantum channel capacities: https://www.math.uwaterloo.ca/~wcleung/co781-f2020.html
Music by Vincent Russo. Theme is WLIIAW.
Quantum channel capacities are known to exhibit counterintuitive properties (superadditivity and superactivation), which make them hard to calculate. In this episode we talk to Debbie Leung (Institute for Quantum Computing, University of Waterloo) about one of her favourite open problems, the capacity of the qubit depolarizing channel, as well as her 2017 paper with Felix Leditzky and Graeme Smith that makes some progress on this problem.
Hosts: Vincent Russo (vprusso.github.io), William Slofstra (elliptic.space), Henry Yuen (henryyuen.net)
Debbie's paper: https://doi.org/10.1103/PhysRevLett.120.160503
Beyond IID in Information Theory: https://sites.google.com/view/beyondiid8/
Link to Debbie's course on quantum channel capacities: https://www.math.uwaterloo.ca/~wcleung/co781-f2020.html
Music by Vincent Russo. Theme is WLIIAW.
Previous Episode
001: The origin of the Mermin-Peres magic square
The Mermin-Peres magic square is a simple game which is at the heart of many results in quantum cryptography and quantum complexity theory. In this episode, we trace the origin of the Mermin-Peres square back to two short papers by N. David Mermin and Asher Peres.
Mermin's paper: https://doi.org/10.1103/PhysRevLett.65.3373
Peres' paper: https://doi.org/10.1016/0375-9601(90)90172-K
Hosts: Vincent Russo (vprusso.github.io), William Slofstra (elliptic.space), Henry Yuen (henryyuen.net)
Theme music is WLIIAW by Vincent Russo
Next Episode
003: Quantum certified deletion with Anne Broadbent
Can you ever be sure that someone has deleted your data? Anne Broadbent (University of Ottawa) tells us about a protocol for "quantum certified deletion", where a recipient of your information can prove to you that they've deleted your information. We learn about her paper with Rabib Islam introducing quantum certified deletion and some of its possible applications to privacy.
Hosts: Vincent Russo (vprusso.github.io), William Slofstra (elliptic.space), Henry Yuen (henryyuen.net)
Broadbent, Islam. Quantum encryption with certified deletion (https://arxiv.org/abs/1910.03551).
Rabib Islam's QCRYPT 2020 talk on their paper: https://www.youtube.com/watch?v=nT8MQC6d358
Theme music is WLIIAW by Vincent Russo.
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