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Madrid, Spain

Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Acta Physica Polonica A | Year: 2015

We investigate several issues related to the electronic states in the ligand orbital of a given transition-metal salt as, for example, a K2CuCl42H2O-type compound. In fact, to get our calculation, we start from an expression for the electronic density of states in a compound of the above type. In addition, various aspects related to superexchange interaction in both the paramagnetic and ferromagnetic cases are discussed and the electronic conduction process in the ligand orbital is studied. Source


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Optik | Year: 2013

The optical potential for photons interacting with matter is expressed mathematically by using the involved relativistic wave-number. In fact, the above expression is derived from equating the optical-potential energy to the kinetic energy of a single photon. Since the photon rest-mass is included in the above mathematical expression, that this mass is actually non-zero and wavelength-dependent is considered. © 2012 Elsevier GmbH. Source


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Optik | Year: 2013

The rest-mass and velocity of the photon are treated as functions of wavelength. In fact, by assuming the photon rest-mass as inversely proportional to wavelength, we show that the photon velocity does not depend on wavelength. In contrast, the photon rest-mass being considered as independent of wavelength, we show that the photon velocity depends on wavelength and we calculate this wavelength dependence. © 2012 Elsevier GmbH. Source


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Advanced Studies in Theoretical Physics | Year: 2012

We present a theoretical-analytical formulation on rapidity of secondary charged particles produced in a given inelastic hadron-nucleus collision at 22.6-400 GeV, starting from considering the maximum rapidity gap relative to charged multiplicity in rapidity space. In fact, the set of rapidity values of the charged particles is characterized as a seminormed set when the charged multiplicity is regarded as sufficiently large. Several relevant parameters and a key continuous linear operator are introduced and calculations involving them are performed. Source


Grado-Caffaro M.A.,Scientific Consultants | Grado-Caffaro M.,Scientific Consultants
Reports on Mathematical Physics | Year: 2012

For the first time, we present a matrix formalism involving the Fock operator relative to a quantum spherical non-parabolic electron gas in the absence of electric and magnetic fields. In fact, a new mathematical physics formulation based on tensor-dyadic product of matrices is proposed for determining the Fock electron energy in a quantum spherical non-parabolic electron gas. In our formulation, phenomenological weight factors are introduced as a measure of electron-electron interaction and electron-confinement effects among other issues. © 2012 Polish Scientific Publishers. Source

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