# Father of Quantum Information Theory Passed Away

We are very sad to inform the quantum community that professor Roman Stanisław Ingarden, famous Polish physicist, passed away on the 12th of July 2011. Before his death he worked as professor emeritus at Nicolaus Copernicus University in Toruń. His scientific achievements have been recognised worldwide. In 1976 he published the paper 'Quantum Information Theory' which is, most probably, the first documented case of using the term 'quantum information theory'. He was also the funder of two scientific journals in the area of mathematical physics: 'Reports on Mathematical Physics' and 'Open Systems and Information Dynamics'. He published numerous papers, textbooks and lecture notes in the scope of theoretical and mathematical physics as well as some philosophical and historical publications.

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## My Collaboration with Professor Ingarden by Masanori Ohya