Coupling vortex dynamics with collective excitations in Bose-Einstein Condensates

Here we analyze the collective excitations as well as the expansion of a trapped Bose-Einstein condensate with a vortex line at its center. To this end, we propose a variational method where the variational parameters have to be carefully chosen in order to produce reliable results. Our variational calculations agree with numerical simulations of the Gross-Pitaevskii equation. The system considered here turns out to exhibit four collective modes of which only three can be observed at a time depending of the trap anisotropy. We also demonstrate that these collective modes can be excited using well established experimental methods such as modulation of the s-wave scattering length

CMF 056: genótipo de mamoeiro com potencial para cultivo no Ceará.

Disponivel no site da Embrapa Agroindustria Tropical

Avaliação de genótipos de feijão-de-corda sob infecção simultânea por "cowpea aphid-borne mosaic virus" e "cucumber mosaic virus".

Avaliacao genotipos feijao-de-corda sob infeccao simultanea;tem se intensificado, no Estado do Ceara, a infeccao simultanea em feijao-de-corda, Vigna unguiculata(L.)Walp., pelo Potyvirus CpAMV e pelo Cucumovirus CMV, que afetam drasticamente o rendimento da cultura nas principaisregioes produtoras.Visando solucionar o problema, executou-se um trabalho em campo no municipio de Brejo Santo, CE; adotou-se o delineamentoem blocos completos casualizados com quatro repeticoes;coletaram-se amostras de plantas infectadas de cada parcela para exame em laboratorioe os dados para as variaveis...bitstream/CNPAT-2010/4777/1/Bp-025.pd

Magnetic Properties of the Metamagnet Ising Model in a three-dimensional Lattice in a Random and Uniform Field

By employing the Monte Carlo technique we study the behavior of Metamagnet Ising Model in a random field. The phase diagram is obtained by using the algorithm of Glaubr in a cubic lattice of linear size $L$ with values ranging from 16 to 42 and with periodic boundary conditions.Comment: 4 pages, 6 figure

Caracterização de Phytophthora e sua patogenidade à pupunha (Bactris gasipaes).

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