40 citations · 162 across the 11 of their papers we have counts for
12 papers
The strong converse theorem for the product-state capacity of quantum channels with ergodic Markovian memory
Tony Dorlas, Ciara Morgan
Establishing the strong converse theorem for a communication channel confirms that the capacity of that channel, that is, the maximum achievable rate of reliable information commun…
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 network quantum information theory
Christoph Hirche, Ciara Morgan, Mark M. Wilde
Polar coding is a method for communication over noisy classical channels which is provably capacity-achieving and has an efficient encoding and decoding. Recently, this method has…