4 citations · 8 across the 6 of their papers we have counts for
6 papers
Persistent currents, deformation and collectivity in the many-boson yrast problem on the circle
E. J. V. de Passos, A. F. R. de Toledo Piza
Properties of the yrast states of a system of bosons confined to a one-dimensional ring and interacting via contact forces is examined both variationally and by numerical diago…
Stability of Bose-Einstein condensates in a circular array
E. T. D. Matsushita, E. J. V. de Passos
The properties of the superfluid phase of ultra cold bosonic atoms loaded in a circular array are investigated in the framework of the Bose-Hubbard model and the Bogoliubov theory.…
Population and phase dynamics of F=1 spinor condensates in an external magnetic field
Dimas Rodrigues Romano, Emerson José Veloso de Passos
We show that the classical dynamics underlying the mean-field description of homogeneous mixtures of spinor F=1 Bose-Einstein condensates in an external magnetic field is integrabl…
Generalization of the Hartree-Fock-Bogoliubov theory: one and two quasiparticle excitations
Paolo Tommasini, E. J. V. de Passos, M. O. C. Pires +1
We present a generalization of the Hartree-Fock Bogoliubov (HFB) theory in which the coupling between one and two quasi-particles is taken into account.This is done by writing the…
Molecular Signatures in Hybrid Atomic/Molecular Bose-Einstein Condensates
Chi-Yong Lin, Paolo Tommasini, E. J. V. de Passos +3
As it was proposed and recently verified experimentally, the mechanism of Feshbach resonance in a condensate can create a second condensate component of molecules that coexists wit…
Non-collapsing quasiparticle random phase approximation for nuclear double-beta decay
F. Krmpotic, A. Mariano, T. T. S. Kuo +2
We show how the longstanding problem of the collapse of the charge-exchange QRPA near the physical value of the force strength can be circumvented. This is done by including the ef…