Accuracy of a teleported trapped field state inside a single bimodal cavity

We propose a simplified scheme to teleport a superposition of coherent states from one mode to another of the same bimodal lossy cavity. Based on current experimental capabilities, we present a calculation of the fidelity that can be achieved, demonstrating accurate teleportation if the mean photon number of each mode is at most 1.5. Our scheme applies as well for teleportation of coherent states from one mode of a cavity to another mode of a second cavity, both cavities embedded in a common reservoir.Comment: 4 pages, 2 figures, in appreciation for publication in Physical Review

Trânsito de máquinas e resistência do solo à penetração em pomar de goiabeiras.

The study was conducted in irrigated commercial orchards of ?Paluma? and ?Pedro Sato? guavas, which were mapped with a Garmin GPS unit (Cx60). Sixty five sampling points were marked on a 21 x 21 m sampling grid. Gravimetric humidity and soil penetration resistance (SPR) were evaluated with the help of an automated penetrometer rod with a type 3 cone at a 45º angle (maximum SPR 15,100 kPa). Data with non-normal distribution were analyzed by geostatistics and interpolation by ordinary kriging. SPR values were higher where machine traffic occurs than on the lines where the crop is planted. There was spatial variability of the SPR among the layers evaluated, with the layer between 0.10-0.20 m, on the line of the machine traffic, presenting a higher SPR (>4000 kPa)

Orbital magnetism in axially deformed sodium clusters: From scissors mode to dia-para magnetic anisotropy

Low-energy orbital magnetic dipole excitations, known as scissors mode (SM), are studied in alkali metal clusters. Subsequent dynamic and static effects are explored. The treatment is based on a self-consistent microscopic approach using the jellium approximation for the ionic background and the Kohn-Sham mean field for the electrons. The microscopic origin of SM and its main features (structure of the mode in light and medium clusters, separation into low- and high-energy plasmons, coupling high-energy M1 scissors and E2 quadrupole plasmons, contributions of shape isomers, etc) are discussed. The scissors M1 strength acquires large values with increasing cluster size. The mode is responsible for the van Vleck paramagnetism of spin-saturated clusters. Quantum shell effects induce a fragile interplay between Langevin diamagnetism and van Vleck paramagnetism and lead to a remarkable dia-para anisotropy in magnetic susceptibility of particular light clusters. Finally, several routes for observing the SM experimentally are discussed.Comment: 21 pages, 7 figure

Orbital Magnetic Dipole Mode in Deformed Clusters: A Fully Microscopic Analysis

The orbital M1 collective mode predicted for deformed clusters in a schematic model is studied in a self-consistent random-phase-approximation approach which fully exploits the shell structure of the clusters. The microscopic mechanism of the excitation is clarified and the close correlation with E2 mode established. The study shows that the M1 strength of the mode is fragmented over a large energy interval. In spite of that, the fraction remaining at low energy, well below the overwhelming dipole plasmon resonance, is comparable to the strength predicted in the schematic model. The importance of this result in view of future experiments is stressed.Comment: 10 pages, 3 Postscript figures, uses revte

Nutrição e teor de nitrato em frutos de berinjela com uso de esterco bovino e termofosfato magnesiano.

Foi avaliado o efeito de doses de esterco bovino e de termofosfato magnesiano, associadas à urina de vaca, sobre a nutrição e o teor de nitrato em frutos de berinjela

Análise de componentes principais aplicada aos teores de macronutrientes e nitrato em frutos de berinjela cultivada com esterco bovino e termofosfato magnesiano.

Objetivou-se estudar o crescimento da berinjela, cultivada com doses de esterco bovino e termofosfato magnesiano, utilizando-se a técnica multivariada de componentes principais.Resumo 785

Diagnóstico de morte de pastagens de Brachiaria brizantha nas regiões de Araguaína, TO e Redenção, PA.

Ocorrência de morte de pastagens de Brachiaria brizantha nas regiões de Araguaína, em Tocantins e Redenção, no sul do Pará, motivou pesquisadores da Embrapa Gado de Corte a realizarem uma viagem de diagnóstico, durante o período de 4 a 9 de março de 1999. Constatou-se que a morte das pastagens ocorria em áreas localizadas (reboleiras) das pastagens. Apesar de terem sido verificadas altas infestações de cigarrinhas-das-pastagens, bem como de cupins subterrâneos, em alguns locais, o excesso de água em áreas de depressão do terreno (condição favorável ao ataque de fungos nas raízes - principalmente do gênero Rhizoctonia), associado a um estado geral de degradação de pastagens por excesso de uso (manejo inadequado), foram consideradas as principais causas da morte de braquiária nas regiões visitadas.bitstream/item/136448/1/DOC-96.pd