4 papers
Strictly isospectral potentials from excited quantum states
R. Klippert, H. C. Rosu
The strictly nonrelativistic isospectral scheme based on the general Riccati solution and Darboux transformation function corresponding to excited states is presented on the follow…
On a SUSY QM scheme for any linear homogeneous differential equation of the second order
R. Klippert, H. C. Rosu
A formal SUSY QM procedure for any linear homogeneous second-order differential equation is briefly sketched up and applied to a simple exactly solvable case
On the self-consistence of electrodynamics in the early universe
R. Klippert, V. A. De Lorenci, M. Novello +1
The issue of a self-consistent solution of Maxwell-Einstein equations achieves a very simple form when all quantum effects are neglected but a weak vacuum polarization due to an ex…
Nonlinear electrodynamics and FRW cosmology
V. A. De Lorenci, R. Klippert, M. Novello +1
Maxwell electrodynamics, considered as a source of the classical Einstein field equations, leads to the singular isotropic Friedmann solutions. We show that this singular behavior…