期刊
JOURNAL OF MATHEMATICAL PHYSICS
卷 43, 期 9, 页码 4299-4306出版社
AMER INST PHYSICS
DOI: 10.1063/1.1498490
关键词
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We discuss conditional Renyi and Tsallis entropies for bipartite quantum systems of finite dimension. We investigate the relation between the positivity of conditional entropies and entanglement properties. It is in particular shown that any state having a negative conditional entropy with respect to any value of the entropic parameter is distillable since it violates the reduction criterion. Moreover, we show that the entanglement of Werner states in odd dimensions can neither be detected by entropic criteria nor by any other spectral criterion. (C) 2002 American Institute of Physics.
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