Quantum universal coding protocols and universal approximation of multi-copy states

Date/Time: 21nd January 2009 / 15:00- - ()

Speaker: Dr. Masahito Hayashi (Tohoku University)

Abstract

We have constructed universal codes for quantum lossless source coding and classical-quantum channel coding.
In this construction, we essentially employ group representation theory.
In order to treat quantum lossless source coding, universal approximation of multi-copy states is discussed in terms of the quantum relative entropy.