148 citations · 416 across the 30 of their papers we have counts for
5 papers · 1 filter
On the effectiveness of Gamow's method for calculating decay rates
R. M. Cavalcanti, C. A. A. de Carvalho
We examine Gamow's method for calculating the decay rate of a wave function initially located within a potential well. Using elementary techniques, we examine a very simple, exactl…
Electron localization by a magnetic vortex
R. M. Cavalcanti, E. S. Fraga, C. A. A. de Carvalho
We study the problem of an electron in two dimensions in the presence of a magnetic vortex with a step-like profile. Dependending on the values of the effective mass and gyromagnet…
Comment on ``Resonant Spectra and the Time Evolution of the Survival and Nonescape Probabilities''
R. M. Cavalcanti
In [G. Garcia-Calderon, J. L. Mateos, and M. Moshinsky, Phys. Rev. Lett. 74, 337 (1995)], the time evolution of the quantum decay of a state initially located within an interaction…
The weakly disordered 2D electron gas in a magnetic field
N. Bralic, R. M. Cavalcanti, C. A. A. de Carvalho +1
We study a relativistic two-dimensional free electron gas in the presence of a uniform external magnetic field and a random static scalar potential. We compute the expectation valu…
Two-dimensional electron gas in a uniform magnetic field in the presence of a delta-impurity
R. M. Cavalcanti, C. A. A. de Carvalho
The density of states and the Hall conductivity of a two-dimensional electron gas in a uniform magnetic field and in the presence of a delta impurity are exactly calculated using e…