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# QCIS Seminar: Quantum universal coding protocols and universal approximation of multi-copy states - Prof Masahito Hayashi, Nagoya University, Japan

Presenter: Prof Masahito Hayashi, Nagoya University, Japan (invited by Prof Runyao Duan)

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.

Brief bio: Masahito Hayashi was born in Japan in 1971. He received his BSc degree from the Faculty of Sciences at Kyoto University, Japan, in 1994 and his MS and PhD degrees in Mathematics from Kyoto University, Japan, in 1996 and 1999, respectively.

Prof Hayashi worked in Kyoto University as a Research Fellow of the Japan Society of the Promotion of Science (JSPS) from 1998 to 2000, and then at the Laboratory for Mathematical Neuroscience, Brain Science Institute, RIKEN from 2000 to 2003. From 2000-2006 he worked for the ERATO Quantum Computation and Information Project, Japan Science and Technology Agency (JST) as the Research Head. He also worked in the Super-robust Computation Project Information Science and Technology Strategic Core (21st Century COE by MEXT), Graduate School of Information Science and Technology, The University of Tokyo as an Adjunct Associate Professor from 2004 to 2007.

In 2006, Prof Hayashi published the book Quantum Information: An Introduction'' through Springer. He worked in the Graduate School of Information Sciences, Tohoku University as Associate Professor from 2007 to 2012. In 2012, he joined the Graduate School of Mathematics, Nagoya University as a Professor, where he now works. He also worked for the Centre for Quantum Technologies, National University of Singapore as Visiting Research Associate Professor from 2009 to 2012, and since 2012 he has been, and is still working for them as a Visiting Research Professor.

In 2011, he received an Information Theory Society Paper Award (2011) for “Information-Spectrum Approach to Second-Order Coding Rate in Channel Coding”.

Prof Hayashi is a Senior Member of IEEE. He is on the Editorial Board of {\it International Journal of Quantum Information} and {\it International Journal On Advances in Security}.

His research interests include quantum information theory and quantum statistical inference.

Date:
14 February 2013
Time:
14:00 - 16:00
Location:
City - Broadway CB10 Level 4, Room 470
Audience:
All Welcome
Contact:
Barbara Munday

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