23,030 research outputs found

    Quasiprobabilities for Multipartite Quantum Correlations of Light

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    Regular quasiprobabilities are introduced for the aim of characterizing quantum correlations of multimode radiation fields. Negativities of these quantum-correlation quasiprobabilities are necessary and sufficient for any quantum correlation encoded in the multimode Glauber-Sudarshan P function. The strength of the method is demonstrated for a two-mode phase randomized squeezed-vacuum state. It has no entanglement, no quantum discord, a positive Wigner function, and a classical reduced single-mode representation. Our method clearly visualizes the quantum correlations of this state.Comment: 7 pages, 3 figure

    A two end family of solutions for the Inhomogeneous Allen-Cahn equation in R^2

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    In this work we construct a family of entire bounded solution for the singulary perturbed Inhomogeneous Allen-Cahn Equation \ep^2\div\left(a(x)\nabla u\right)-a(x)F'(u)=0 in R2\R^2, where \ep\to 0. The nodal set of these solutions is close to a "nondegenerate" curve which is asymptotically two non paralell straight lines. Here FF' is a double-well potential and aa is a smooth positive function. We also provide example of curves and functions aa where our result applies. This work is in connection with the results found by Z.Du and B.Lai, Z.Du and C.Gui, and F. Pacard and M. Ritore, in "Transition layers for an inhomogeneus Allen-Cahn equation in Riemannian Manifolds", "Interior layers for an inhomogeneous Allen-Cahn equation", "From the constant mean curvature hypersurfaces to the gradient theory of phase transitions" respectively, where they handle the compact case.Comment: arXiv admin note: text overlap with arXiv:0902.2047 by other author

    Cambios en la estrategia, la estructura y las capacidades en una organización de doble dimensión: el caso del Hospital San Vicente* luego de la Ley 100 de 1993

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    Este artículo proporciona información sobre los cambios en la estrategia, la estructura y las capacidades que el Hospital San Vicente implementó para ser sostenible en el contexto de los cambios regulatorios en salud de los últimos veinte años en Colombia -- En este caso se describe cómo el Hospital San Vicente (entidad sin ánimo de lucro) pasó de ser una institución que financiaba su operación mayoritariamente con dineros provenientes del Estado, la venta de servicios a pacientes particulares y donaciones y aportes de benefactores, a ser un grupo de empresas sólidas y financieramente rentables que se unificaron para generar ingresos suficientes y lograr conjuntamente el cumplimiento de su misión asistencial enfocada a la atención de los pacientes con menos recursos económicos -- Se amplían cuatro aspectos importantes dentro del desarrollo organizacional, como son: estrategia, estructura, capacidades y doble dimensió
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