The notion of composite system made up of distinguishable parties is
investigated in the context of arbitrary convex spaces.Comment: 9 pages. Comments are welcom
We outline a programme for an axiomatic reconstruction of quantum mechanics based on the statistical duality of states and effects that combines the use of a theorem of Solér with the idea of symmetry. We also discuss arguments favouring the choice of the complex field.
This article is part of the themed issue 'Second quantum revolution: foundational questions'
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