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