Optimal Compression for Identically Prepared Qubit States.
We establish the ultimate limits to the compression of sequences of identically prepared qubits. The limits are determined by Holevo's information quantity and are attained through use of the optimal universal cloning machine, which finds here a novel application to quantum Shannon theory.
Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong.
Yuxiang
Y
Yang
Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong.|Canadian Institute for Advanced Research, CIFAR Program in Quantum Information Science, Toronto, Ontario M5G 1Z8, Canada.
Giulio
G
Chiribella
Graduate School of Mathematics, Nagoya University, Nagoya, Japan.|Centre for Quantum Technologies, National University of Singapore, Singapore 117543, Singapore.
Masahito
M
Hayashi