Planejamento estratégico e priorização de projetos em uma Instituição Pública de Pesquisa Agropecuária: o caso da Embrapa Suínos e Aves.

Projeto/Plano de Ação: 11.11.11.111

Processo de gestão de projetos de pesquisa, desenvolvimento e inovação na Empresa Brasileira de Pesquisa Agropecuária ? Embrapa.

Projeto/Plano de Ação: 11.11.11.111

IR Spectrum of Benzoic Acid-Naphthalene Eutectic

693-69

Política industrial e tecnológica no Brasil: uma investigação dos determinantes das escolhas políticas.

Projeto/Plano de Ação: 11.11.11.111

A definição da agenda de pesquisa em ciência, tecnologia e inovação no Brasil: o caso da Embrapa e da Fiocruz

Projeto/Plano de Ação: 11.11.11.111

Collapse models with non-white noises

We set up a general formalism for models of spontaneous wave function collapse with dynamics represented by a stochastic differential equation driven by general Gaussian noises, not necessarily white in time. In particular, we show that the non-Schrodinger terms of the equation induce the collapse of the wave function to one of the common eigenstates of the collapsing operators, and that the collapse occurs with the correct quantum probabilities. We also develop a perturbation expansion of the solution of the equation with respect to the parameter which sets the strength of the collapse process; such an approximation allows one to compute the leading order terms for the deviations of the predictions of collapse models with respect to those of standard quantum mechanics. This analysis shows that to leading order, the ``imaginary'' noise trick can be used for non-white Gaussian noise.Comment: Latex, 20 pages;references added and minor revisions; published as J. Phys. A: Math. Theor. {\bf 40} (2007) 15083-1509

Breaking quantum linearity: constraints from human perception and cosmological implications

Resolving the tension between quantum superpositions and the uniqueness of the classical world is a major open problem. One possibility, which is extensively explored both theoretically and experimentally, is that quantum linearity breaks above a given scale. Theoretically, this possibility is predicted by collapse models. They provide quantitative information on where violations of the superposition principle become manifest. Here we show that the lower bound on the collapse parameter lambda, coming from the analysis of the human visual process, is ~ 7 +/- 2 orders of magnitude stronger than the original bound, in agreement with more recent analysis. This implies that the collapse becomes effective with systems containing ~ 10^4 - 10^5 nucleons, and thus falls within the range of testability with present-day technology. We also compare the spectrum of the collapsing field with those of known cosmological fields, showing that a typical cosmological random field can yield an efficient wave function collapse.Comment: 13 pages, LaTeX, 3 figure

On the long time behavior of Hilbert space diffusion

Stochastic differential equations in Hilbert space as random nonlinear modified Schroedinger equations have achieved great attention in recent years; of particular interest is the long time behavior of their solutions. In this note we discuss the long time behavior of the solutions of the stochastic differential equation describing the time evolution of a free quantum particle subject to spontaneous collapses in space. We explain why the problem is subtle and report on a recent rigorous result, which asserts that any initial state converges almost surely to a Gaussian state having a fixed spread both in position and momentum.Comment: 6 pages, EPL2-Te

A implementação de políticas públicas pelas instituições públicas de pesquisa: um estudo sobre pesquisas e tecnologias da Embrapa Suínos e Aves para mitigação do impacto ambiental da suinocultura no oeste catarinense. Brasil

Projeto: 11.11.11.111