6,533 research outputs found

    Soja e diabetes.

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    Soja diabetes; Introdução; Histórico e descrição da doença; Dieta ediabetes; Soja e hipoglicemia; Receitas: Receita básica; Kinako; Receitas especiais para diabéticos utilizando kinako, farinha de arroz e adoçante; Bolo de laranja; Biscoitinhos de coco; Biscoitinhos de aveia; Bolo de limão.bitstream/item/43632/1/Doc1761.pdfTraduzido por José Marcos Gontijo Mandarino, Varea de Toledo Benassi. Tradução de: Diabetes the all-american affliction, capítulo 10 de The simple soybean and your health

    Microscopic description of dissipative dynamics of a level crossing transition

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    We analyze the effect of a dissipative bosonic environment on the Landau-Zener-Stuckelberg-Majorana (LZSM) level crossing model by using a microscopic approach to derive the relevant master equation. For an environment at zero temperature and weak dissipation our microscopic approach confirms the independence of the survival probability on the decay rate that has been predicted earlier by the simple phenomenological LZSM model. For strong decay the microscopic approach predicts a notable increase of the survival probability, which signals dynamical decoupling of the initial state. Unlike the phenomenological model our approach makes it possible to study the dependence of the system dynamics on the temperature of the environment. In the limit of very high temperature we find that the dynamics is characterized by a very strong dynamical decoupling of the initial state - temperature-induced quantum Zeno effect.Comment: 6 pages, 4 figure

    Spin-1/2 sub-dynamics nested in the quantum dynamics of two coupled qutrits

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    In this paper we investigate the quantum dynamics of two spin-1 systems, S1\vec{\textbf{S}}_1 and S2\vec{\textbf{S}}_2, adopting a generalized (S1+S2)2(\vec{\textbf{S}}_1+\vec{\textbf{S}}_2)^2-nonconserving Heisenberg model. We show that, due to its symmetry property, the nine-dimensional dynamics of the two qutrits exactly decouples into the direct sum of two sub-dynamics living in two orthogonal four- and five-dimensional subspaces. Such a reduction is further strengthened by our central result consisting in the fact that in the four-dimensional dynamically invariant subspace, the two qutrits quantum dynamics, with no approximations, is equivalent to that of two non interacting spin 1/2's. The interpretative advantages stemming from such a remarkable and non-intuitive nesting are systematically exploited and various intriguing features consequently emerging in the dynamics of the two qutrits are deeply scrutinised. The possibility of exploiting the dynamical reduction brought to light in this paper for exactly treating as well time-dependent versions of our Hamiltonian model is briefly discussed.Comment: 14 pages, 11 figures; Last two authors name corrected, corrected typos, Fig. 11 changed (same result
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