Teleportation of entangled states without Bell-state measurement

In a recent paper [Phys. Rev. A 70, 025803 (2004)] we presented a scheme to teleport an entanglement of zero- and one-photon states from a bimodal cavity to another one, with 100% success probability. Here, inspired on recent results in the literature, we have modified our previous proposal to teleport the same entangled state without using Bell-state measurements. For comparison, the time spent, the fidelity, and the success probability for this teleportation are considered.Comment: 4 pages, 1 figure, published in Phys. Rev. A 72, 045802 (2005

Origin of the Significant Impact of Ta on the Creep Resistance of FeCrNi Alloys

Heat resistant FeCrNi alloys are widely used in the petrochemical industry because they exhibit a unique combination of creep and oxidation resistance at temperatures exceeding 900$^\circ$C. Their creep properties are often optimized by micro-additions of carbide forming elements. In the present work, the influence of Ta micro-additions has been experimentally investigated both on as-cast and aged microstructures to understand the origin of the significant impact of this element on the creep resistance. Calculations with thermocal software were also carried out to support experimental data. It is shown that a small addition of Ta is beneficial as it increases the volume fraction of stable MC carbides. We demonstrate also that additions of Ta may have a dramatic effect on the thermal stability of microstructures. This is attributed to a smaller equilibrium volume fraction of M23C6 and more pronounced heterogeneous precipitation at MC/matrix interfaces. The influence on the creep properties in then discussed

Spin-glass behaviour on random lattices

The ground-state phase diagram of an Ising spin-glass model on a random graph with an arbitrary fraction $w$ of ferromagnetic interactions is analysed in the presence of an external field. Using the replica method, and performing an analysis of stability of the replica-symmetric solution, it is shown that $w=1/2$, correponding to an unbiased spin glass, is a singular point in the phase diagram, separating a region with a spin-glass phase ($w<1/2$) from a region with spin-glass, ferromagnetic, mixed, and paramagnetic phases ($w>1/2$)

Custo de produção em pecuária de corte em 2009, no Pantanal de Aquidauana (MS).

Conforme os cálculos feitos com os dados levantados na região de Aquidauana, a receita da pecuária de corte consegue cobrir o custo operacional efetivo (COE) e o custo operacional total (COT), é suficiente para abater a depreciação, mas insuficiente para cobrir o capital investido (CI). Este fato indica que a atividade é um investimento sustentável e lucrativo, no curto e no médio prazo, mas não no longo prazo, pois o produtor não conseguirá remunerar seu capital investido.bitstream/CPAP-2010/57273/1/COT77.pd

Custo de produção em pecuária de corte em 2009, no Pantanal de Corumbá (MS).

De acordo com os cálculos dos dados levantados na região de Corumbá, o estudo revelou que a receita da pecuária de corte consegue cobrir o custo operacional efetivo (COE) e o custo operacional total (COT), é suficiente para abater a depreciação, mas insuficiente para cobrir o capital investido (CI). Este fato indica que a atividade é um investimento sustentável e lucrativo, no curto e no médio prazo, mas não em longo prazo, pois o produtor não conseguirá remunerar seu capital investido.bitstream/CPAP-2010/57272/1/COT76.pd

Information complementarity in quantum physics

We demonstrate that the concept of information offers a more complete description of complementarity than the traditional approach based on observables. We present the first experimental test of information complementarity for two-qubit pure states, achieving close agreement with theory; We also explore the distribution of information in a comprehensive range of mixed states. Our results highlight the strange and subtle properties of even the simplest quantum systems: for example, entanglement can be increased by reducing correlations between two subsystems.Comment: 6 pages, 7 figures (including supplementary material