منابع مشابه
Renyi generalizations of the conditional quantum mutual information
The conditional quantum mutual information I(A;B|C) of a tripartite state ρABC is an information quantity which lies at the center of many problems in quantum information theory. Three of its main properties are that it is non-negative for any tripartite state, that it decreases under local operations applied to systems A and B, and that it obeys the duality relation I(A;B|C) = I(A;B|D) for a f...
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In this paper, we first show that Renyi distance between any member of a parametric family and its perturbations, is proportional to its Fisher information. We, then, prove some relations between the Renyi distance of two distributions and the Fisher information of their exponentially twisted family of densities. Finally, we show that the partial ordering of families induced by Renyi dis...
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We analyse the information obtained by an eavesdropper during the various stages of a quantum cryptographic protocol associated with key distribution . We provide both an upper and a lower limit on the amount of information that may have leaked to the eavesdropper at the end of the key distribution procedure . These limits are restricted to intercept/resend eavesdropping strategies . The upper ...
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A short quantum Markov chain is a tripartite state ρABC such that system A can be recovered perfectly by acting on system C of the reduced state ρBC . Such states have conditional mutual information I(A;B|C) equal to zero and are the only states with this property. A quantum channel N is sufficient for two states ρ and σ if there exists a recovery channel using which one can perfectly recover ρ...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2007
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/70/1/012005