6 papers
Equilibrium and stability properties of a coupled two-component Bose-Einstein condensate
Chi-Yong Lin, E. J. V. de Passos, M. S. Hussein +2
The equilibrium and stability properties of a coupled two-component BEC is studied using a variational method and the one-dimensional model of Williams and collaborators. The varia…
The mean energy, strength and width of triple giant dipole resonances
E. J. V. de Passos, M. S. Hussein, L. F. Canto +1
We investigate the mean energy, strength and width of the triple giant dipole resonance using sum rules.
Time-Dependent Variational Analysis of Josephson Oscillations in a Two-component Bose-Einstein Condensate
Chi-Yong Lin, E. J. V. de Passos, Da-Shin Lee
The dynamics of Josephson-like oscillations between two coupled Bose-Einstein condensates is studied using the time-dependent variational method. We suppose that the quantum state…
Self Consistent and Renormalized particle-particle RPA in a Schematic Model
E. J. V. de Passos, A. F. R. de Toledo Piza, F. Krmpotić
The dynamical effects of ground state correlations for excitation energies and transition strengths near the superfluid phase transition are studied in the soluble two level pairin…
Self consistent random phase approximation within the O(5) model and Fermi transitions
F. Krmpotic, E. J. V. de Passos, D. S. Delion +2
Self Consistent Quasiparticle Random Phase Approximation (SCQRPA) is considered in application to the Fermi transitions within the O(5) model. It is demonstrated that SCQRPA improv…
Violation of the Ikeda sum rule and the self-consistency in the renormalized quasiparticle random phase approximation and the nuclear double-beta decay
F. Krmpotic, T. T. S. Kuo, A. Mariano +2
The effect of the inclusion of ground state correlations into the QRPA equation of motion for the two-neutrino double beta () decay is carefully analyzed. The resulting mo…