'Why the quantum?' was one of John Wheeler's 'Really Big Questions.' Several authors have recently proposed to derive quantum theory from simple axioms (Hardy quant-ph/0101012
), or from broadly information-theoretic principles (Fuchs quant-ph/0205039
, Clifton, Bub, Halvorson quant-ph/0211089
; Brukner, Zeilinger quant-ph/0212084
). Here I consider the significance of such programs for our understanding of quantum correlations.
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