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Nonlinear evolution and signaling

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arxiv 1906.03869 v1 pith:URFJD2EQ submitted 2019-06-10 quant-ph

classification quant-ph
keywords nonlinearconditionevolutionevolutionsquasi-linearitysatisfyingsignalingallow
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We propose a condition, called convex quasi-linearity, for deterministic nonlinear quantum evolutions. Evolutions satisfying this condition do not allow for arbitrary fast signaling, therefore, they cannot be ruled out by a standard argument. We also give an explicit example of a nonlinear qubit evolution satisfying quasi-linearity.

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