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24 papers · 1 filter
Virtual states of light non-Borromean halo nuclei
A. Delfino, T. Frederico, M. S. Hussein +1
It is shown that the three-body non-Borromean halo nuclei like ^{12}Be, ^{18}C, ^{20}C have p-wave virtual states with energy of about 1.6 times the corresponding neutron-core bind…
Broad Histogram Method for Multiparametric Hamiltonians
A. R. Lima, P. M. C. de Oliveira, T. J. P. Penna
We extended the Broad Histogram Method in order to obtain spectral degeneracies for systems with multiparametric Hamiltonians. As examples we obtained the critical lines for the sq…
Comment on the Adiabatic Condition
A. C. Aguiar Pinto, M. C. Nemes, J. G. Peixoto de Faria +1
The experimental observation of effects due to Berry's phase in quantum systems is certainly one of the most impressive demonstrations of the correctness of the superposition princ…
The Penna model for biological ageing on a lattice: spatial consequences of child-care
A. O. Sousa, S. Moss de Oliveira
We introduce a square lattice into the Penna bit-string model for biological ageing and study the evolution of the spatial distribution of the population considering different stra…
The mean-field theory for attraction between like-charged macromolecules
Jeferson J. Arenzon, Yan Levin, Juergen F. Stilck
A mean-field theory based on Gibbs-Bogoliubov inequality is constructed to study the interactions between two like-charged polyions. It is shown that contrary to the previously est…
The age problem and growing of structures for open system cosmology
M. de Campos, N. A. Tomimura
A new equation for the density contrast is derived in the framework of reexamined Newtonian cosmology taken into account adiabatic matter creation in the universe. The age of the u…