This book discusses a fundamental problem of the natural sciences, namely, the observation of physical and biological systems and the principles by which we gain information about these systems. Is it relevant whether the human observer is himself a part of the system in question? What difference does this make to our representation of the physical world? These difficult questions have occupied scientists and philosophers from Decartes to Bell. In the light of recent advances in quantum mechanics and the theory of dynamical systems, there is good reason to tackle these problems afresh. This...

This book constitutes the refereed proceedings of the 7th International Conference on Quantum Interaction, QI 2013, held in Leicester, UK, in July 2013. The 31 papers presented in this book were carefully selected from numerous submissions. The papers cover various topics on quantum interaction and revolve around four themes: information processing/retrieval/semantic representation and logic; cognition and decision making; finance/economics and social structures and biological systems.