Abstract
Several authors have hypothesized that completely positive maps should provide the means for generalizing quantum dynamics. In a critical analysis of that proposal, we show that such maps are incompatible with the standard phenomenological theory of spin relaxation and that the theoretical argument which has been offered as justification for the hypothesis is fallacious.
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Simmons, R.F., Park, J.L. On completely positive maps in generalized quantum dynamics. Found Phys 11, 47–55 (1981). https://doi.org/10.1007/BF00715195
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DOI: https://doi.org/10.1007/BF00715195