Journal
JOURNAL OF MATHEMATICAL PHYSICS
Volume 55, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4863715
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Funding
- Science and Technology Assistance Agency [APVV-0178-11]
- [VEGA 2/0125/13]
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We introduce and study norms in the space of hermitian matrices, obtained from base norms in positively generated subspaces. These norms are closely related to discrimination of so-called generalized quantum channels, including quantum states, channels, and networks. We further introduce generalized quantum decision problems and show that the maximal average payoffs of decision procedures are again given by these norms. We also study optimality of decision procedures, in particular, we obtain a necessary and sufficient condition under which an optimal 1-tester for discrimination of quantum channels exists, such that the input state is maximally entangled. (C) 2014 AIP Publishing LLC.
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