62 citations · 528 across the 51 of their papers we have counts for
7 papers · 1 filter
Dressed-state approach to a simple radiating atom
G. Flores-Hidalgo, A. P. C. Malbouisson
We consider a system consisting of an atom in the dipole approximation, coupled to the electromagnetic field. Using recently introduced renormalized coordinates and dressed states,…
Time evolution of quantum systems in microcavities and in free space -- a non-perturbative approach
G. Flores-Hidalgo, A. P. C. Malbouisson
We consider a system consisting of a particle in the harmonic approximation, having frequency , coupled to a scalar field inside a spherical reflecting cavity of diameter $L…
First-order phase transitions in confined systems
C. A. Linhares, A. P. C. Malbouisson, I. Roditi
In a field-theoretical context, we consider the Euclidean model compactified in one of the spatial dimensions. We are able to determine the dependence of the transiti…
Confinement in the 3-dimensional Gross-Neveu model
A. P. C. Malbouisson, J. M. C. Malbouisson, A. E. Santana +1
We consider the -components 3-dimensional massive Gross-Neveu model compactified in one spatial direction, the system being constrained to a slab of thickness . We derive a c…
A minimal size for granular superconductors
L. M. Abreu, A. P. C. Malbouisson, I. Roditi
We investigate the minimal size of small superconducting grains by means of a Ginzburg-Landau model confined to a sphere of radius . This model is supposed to describe a materia…
Gauge Fluctuations in Superconducting Films
L. M. Abreu, A. P. C. Malbouisson, I. Roditi
In this paper we consider a superconducting film modeled by the Ginzburg-Landau model, confined between two parallel planes a distance apart from one another. Our approach is b…