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Abstract

In ordinary classical probability theory, and to a large extent in classical general relativity, time does not have a privileged role. Yet quantum theory treats space and time very differently. There have been various proposals in the literature for how to define a joint state of several quantum systems that exist at different moments in time. The aim of the project is to evaluate these proposals and to develop them further. The project will investigate, for example, whether there is an operational meaning for a proposed joint state in terms of experimental outcomes, and whether entropies and mutual informations can be defined for temporally separated systems.

Prerequisites: Quantum Information