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Artículo
Artículo
Do the profile function singularities explain the high energy reflection of fermions in a phase transition?
(Elsevier, 1996)
We investigate the scope of a previous result concerning the behaviour of fermions hitting a general wall caused by a first-order phase transition. The waI1 profiIe function was considered to be analytic in the real axis. ...
Artículo
Controlling low-temperature tunneling dynamics with external fields
(American Physical Society, 1996)
The tunneling of a particle between two states, as influenced by coupling the particle to an external field, is investigated. A spin-boson Hamiltonian is used to describe the tunnel system and its interaction with a medium ...
Artículo
Model kinetic equation for low-density granular flow
(American Physical Society, 1996)
A model kinetic equation is proposed to describe the time evolution of a gas composed of particles which collide inelastically. Dissipation in collisions is described by means of a parameter which is related to the coefficient ...
Tesis Doctoral
Artículo
A Symmetry-Adapted Algebraic Approach to Molecular Spectroscopy
(Scielo, 1996)
We apply a symmetry-adapted algebraic model to the vibrational excitations in D_3h and T_d molecules. A systematic procedure is used to establish the relation between the algebraic and configuration space formulations. In ...
Artículo
Wetting and interfacial order at nematic free surfaces
(IOP Publishing Ltd., 1996-07-20)
We apply a density-functional theory to the free surface of a model liquid crystal, to investigate the orientational order at the nematic free surface of systems exhibiting orientational wetting at the isotropic liquid-vapour ...
Artículo
Expansion for the moments of a nonlinear stochastic model
(American Physical Society, 1996-10-14)
We present a procedure to systematically evaluate all the moments of the Fokker-Planck equation by expanding them in a power series in a given function of t. The expansion coefficients are easily determined in terms of ...
Artículo
Practical kinetic model for hard sphere dynamics
(American Physical Society, 1996-08-12)
The revised Enskog theory for a classical system of hard spheres provides a unified description of both fluid and crystal states over a wide range of densities and wavelengths. However, practical applications of this theory ...