As applications of the method, I will discuss optimal architectures for quantum metrology, multiround protocols for reference frames alignment, optimal learning and programming of quantum gates, and multiround discrimination of quantum channels. Finally, I will briefly highlight the relevance of quantum combs to the information-theoretic foundations of Quantum Theory .
 G. Chiribella, G. M. D'Ariano, and P. Perinotti, Quantum Circuits Architecture, Phys. Rev. Lett. 101, 060401 (2008).
 G. Chiribella, G. M. D'Ariano, and P. Perinotti, Theoretical Framework for Quantum Networks, Phys. Rev. A 80, 022339 (2009). G. Chiribella, G. M. D'Ariano, and P. Perinotti, Informational Derivation of Quantum Theory, Phys. Rev. A 84, 012311 (2011).
Giulio Chiribella is a Senior Postdoctoral Fellow at Perimeter Institute for Theoretical Physics and an Affiliate Member of the Institute for Quantum Computation, Waterloo. His research areas are Quantum Information, Foundations of Quantum Mechanics and Mathematical Physics. Dr. Chiribella's research on group theoretical methods for Quantum Estimation Theory was recently awarded the Hermann Weyl Prize at the 28th International Colloquium on Group Theoretical Methods in Physics, Northumbria University, Newcastle upon Tyne, UK, July 2010.