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Artículo
Boundary conditions and normal state for a vibrated granular fluid
(American Physical Society, 2000)
The steady state of a fluidized granular system confined between a vibrating wall and a reflecting one is analyzed in detail. The relationship between the velocity of the wall and the hydrodynamic profiles is established. ...
Artículo
Remarks on the determination of the Landau gauge OPE for the asymmetric three gluon vertex
(American Physical Society, 2001-12-01)
We compute a compact operator product expansion (OPE) formula describing power corrections to the perturbative expression for the asymmetric momentum subtraction–(MOM̃−) renormalized running coupling constant up to the ...
Artículo
Intrinsic state for an extended version of the interacting boson model
(American Physical Society, 2000-03-01)
An intrinsic-state formalism for the interacting boson model IBM-4 is presented. A basis of deformed bosons is introduced which allows the construction of a general trial wave function that has Wigner’s spin-isospin SU(4) ...
Artículo
Fourier state of a fluidized granular gas
(European Physical Society, 2001)
It is shown that the Boltzmann equation for smooth inelastic hard disks or spheres admits a solution describing a steady state characterized by uniform pressure and linear temperature profile. Such a state has been observed ...
Artículo
Memory effects in the relaxation of ising models
(IOP Publishing Ltd., 2002)
It is analytically shown that the one-dimensional Ising model with Glauber dynamics exhibits short-time memory effects when submitted to an abrupt change in temperature. These effects are qualitatively similar to those ...
Artículo
Transversal inhomogeneities in dilute vibrofluidized granular fluids
(American Physical Society, 2002)
The spontaneous symmetry breaking taking place in the direction perpendicular to the energy flux in a dilute vibrofluidized granular system is investigated, using both a hydrodynamic description and simulation methods. The ...
Artículo
Anharmonic double-phonon excitations in the interacting boson model
(American Physical Society, 2002-12-01)
Double−γ vibrations in deformed nuclei are analyzed in the context of the interacting boson model. A simple extension of the original version of the model towards higher-order interactions is required to explain the observed ...
Artículo
Orientational transitions in a nematic liquid crystal confined by competing surfaces
(American Physical Society, 2001)
The effect of confinement on the orientational structure of a nematic liquid crystal model has been investigated by using a version of density-functional theory. We have focused on the case of a nematic confined by opposing ...
Artículo
Anharmonic double-γ vibrations in nuclei and their description in the interacting boson model
(American Physical Society, 2000-04-01)
Double-γ vibrations in deformed nuclei are studied in the context of the interacting boson model with special reference to their anharmonic character. It is shown that large anharmonicities can be obtained with interactions ...
Artículo
Coupling of Dipole Mode to γ -unstable Quadrupole Oscillations
(Elsevier, 2000)
The coupling of the high-lying dipole mode to the low-lying quadrupole modes for the case of deformed γ-unstable nuclei is studied. Results from the geometrical model are compared to those obtained within the dipole boson ...