We show that finite-dimensional order unit spaces equipped with a continuous sequential product as defined by Gudder and Greechie are homogeneous and self-dual. As a consequence of the Koecher-Vinberg theorem, these spaces therefore correspond to Euclidean Jordan algebras. We remark on the significance of this result in the context of reconstructions of quantum theory. In particular, we show that sequential product spaces must be C*-algebras when their vector space tensor product is also a sequential product space (in the parlance of operational theories, when the space “allows a local composite”). We also show that sequential product spaces in infinite dimension correspond to JB-algebras when a few additional conditions are satisfied. Finally, we remark on how changing the axioms of the sequential product might lead to a new characterization of homogeneous cones.
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June 2019
Research Article|
June 10 2019
Sequential product spaces are Jordan algebras
John van de Wetering
John van de Wetering
a)
Institute for Computing and Information Sciences, Radboud University
, Toernooiveld 212, Nijmegen, Netherlands
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Electronic mail: john@vdwetering.name
J. Math. Phys. 60, 062201 (2019)
Article history
Received:
February 21 2019
Accepted:
May 12 2019
Citation
John van de Wetering; Sequential product spaces are Jordan algebras. J. Math. Phys. 1 June 2019; 60 (6): 062201. https://doi.org/10.1063/1.5093504
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