17:00 (CET) May 11, Prof. Dr. Claus Kiefer ( University of Cologne)
DECOHERENCE IN QUANTUM MECHANICS AND QUANTUM COSMOLOGY
How does the classical behaviour emerge in a world that is fundamentally described by quantum theory? The key to the answer is given by a process that was described for the first time in 1970- decoherence. Decoherence is the irreversible emergence of classical properties of a quantum system through the unavoidable interaction with its environment. In my talk, I give a general introduction into decoherence and present its most important theoretical and experimental applications. I discuss the situation in quantum mechanics including the relevance of decoherence for the interpretation of quantum theory. I then turn to quantum cosmology and explain how the classical appearance of the metric and matter fields can be understood in a theory of quantum gravity where arbitrary metric superpositions can occur. I also address the relevance of decoherence for the origin of the arrow of time.
Thank you for your interest in our research. Get in touch with us for any questions or comments regarding research in the interface of quantum mechanics, field theory and gravity.
, , , ,