238 research outputs found
Asymmetric quantum hypothesis testing with Gaussian states
We consider the asymmetric formulation of quantum hypothesis testing, where
two quantum hypotheses have different associated costs. In this problem, the
aim is to minimize the probability of false negatives and the optimal
performance is provided by the quantum Hoeffding bound. After a brief review of
these notions, we show how this bound can be simplified for pure states. We
then provide a general recipe for its computation in the case of multimode
Gaussian states, also showing its connection with other easier-to-compute lower
bounds. In particular, we provide analytical formulas and numerical results for
important classes of one- and two-mode Gaussian states.Comment: REVTeX. Published versio
Catálogos colectivos: ¿reales o virtuales? Una revisión de la literatura
Review of the literature on union catalogs published during the last five years. Developments in the area of distributed search gave place to the creation of virtual union catalogs. Characteristics of both traditional and virtual union catalogs are analyzed, comparing their respective advantages and disadvantages
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