103 citations · 658 across the 29 of their papers we have counts for
5 papers · 2 filters
Operational meaning of quantum measures of recovery
Tom Cooney, Christoph Hirche, Ciara Morgan +4
Several information measures have recently been defined which capture the notion of "recoverability." In particular, the fidelity of recovery quantifies how well one can recover a…
Decoupling with random diagonal unitaries
Yoshifumi Nakata, Christoph Hirche, Ciara Morgan +1
We investigate decoupling, one of the most important primitives in quantum Shannon theory, by replacing the uniformly distributed random unitaries commonly used to achieve the prot…
Unitary -designs from random - and -diagonal unitaries
Yoshifumi Nakata, Christoph Hirche, Ciara Morgan +1
Unitary -designs are random unitaries simulating up to the second order statistical moments of the uniformly distributed random unitaries, often referred to as Haar random unita…
An improved rate region for the classical-quantum broadcast channel
Christoph Hirche, Ciara Morgan
We present a new achievable rate region for the two-user binary-input classical-quantum broadcast channel. The result is a generalization of the classical Marton-Gelfand-Pinsker re…
Polar codes in quantum information theory
Christoph Hirche
Polar codes are the first capacity achieving and efficiently implementable codes for classical communication. Recently they have also been generalized to communication over classic…