منابع مشابه
Characterizing entanglement sources
We discuss how to characterize entanglement sources with finite sets of measurements. The measurements do not have to be tomographically complete and may consist of POVMs rather than von Neumann measurements. Our method yields a probability that the source generates an entangled state as well as estimates of any desired calculable entanglement measures, including their error bars. We apply two ...
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Entangled states have been known almost from the very beginning of quantum mechanics @1,2#, and their somewhat unusual features have been investigated for many years. However, recent developments in the theory of quantum information @3# have required a deeper knowledge of their properties. The simplest system where one can study entanglement is represented by a bipartite system. In such a syste...
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Graph complexity measures like tree-width, clique-width and rank-width are important because they yield Fixed Parameter Tractable algorithms. These algorithms are based on hierarchical decompositions of the considered graphs and on boundedness conditions on the graph operations that, more or less explicitly, recombine the components of decompositions into larger graphs. Rank-width is de ned in ...
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The quantification of multipartite entanglement is an open and very challenging problem. An exhaustive definition of bipartite entanglement exists and hinges upon the von Neumann entropy and the entanglement of formation, but the problem of defining multipartite entanglement is more difficult and no unique definition exists: different definitions tend indeed to focus on different aspects of the...
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ژورنال
عنوان ژورنال: New Journal of Physics
سال: 2016
ISSN: 1367-2630
DOI: 10.1088/1367-2630/aa5015