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2017

Process Products Need Qualification

Jia, Ding, Sakharwade, Nitica

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The quantum process framework is devised as a generalization of quantum theory to incorporate indefinite causal structure.

In this short paper we point out a restriction in forming products of processes: there exist both classical and quantum processes whose tensor products are not processes.
Our main result is a necessary and sufficient condition for when tensor products of multipartite processes are (in)valid.
We briefly discuss the implications of this restriction on process communication theory.

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Built on

M.-D. Choi, Linear Algebra and Its Applications 10
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L. Hardy, Journal of Physics A: Mathematical and Theoretical 40
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Earlier work this paper cites.
L. Hardy, in Quantum Reality, Relativistic Causality, and Closing the Epistemic Circle (Springer, 2009), pp. 379–401
2009
Earlier work this paper cites.

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Cited in the paper.

Then

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Later among the works it cites.
D. Jia (2017), UWSpace. http://hdl.handle.net/10012/11998
2017
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