Journal Article


Ciara Morgan
T. C. Dorlas


Computer Science

channel quantum scale memory probabilities capacity channel capacity general

Invalidity of a strong capacity for a quantum channel with memory (2011)

Abstract The strong capacity of a particular channel can be interpreted as a sharp limit on the amount of information which can be transmitted reliably over that channel. To evaluate the strong capacity of a particular channel one must prove both the direct part of the channel coding theorem and the strong converse for the channel. Here we consider the strong converse theorem for the periodic quantum channel and show some rather surprising results. We first show that the strong converse does not hold in general for this channel and therefore the channel does not have a strong capacity. Instead, we find that there is a scale of capacities corresponding to error probabilities between integer multiples of the inverse of the periodicity of the channel. A similar scale also exists for the random channel.
Collections Ireland -> DAIR -> Type = Article
Ireland -> DAIR -> Status = Published

Full list of authors on original publication

Ciara Morgan, T. C. Dorlas

Experts in our system

Ciara Morgan
University College Cork
Total Publications: 8
T. C. Dorlas
Total Publications: 44