arXiv subjects

Omar Mustafa

Publications and source records attributed to Omar Mustafa.

112 records · Page 7Linked to original sources

arXiv1999

Exact energy eigenvalues of the generalized Dirac-Coulomb equation via a modified similarity transformation

With the aid of a modified similarity transformation we obtained exact energy eigenvalues of the generalized Dirac-Coulomb equation. This equation consists of the time component of the Lorentz 4-vector potential V_v(r)=-A_1/r, and a Lorentz scalar potential V_s(r)=-A_2/r. The transformed radial equations are so simple that their solutions are inferred from the conventional solutions of the Schrodinger equation.

math-ph↗

arXiv1999

Perturbed Coulomb potentials in the Klein-Gordon equation via the shifted-1 expansion technique

A shifted - l expansion technique is introduced to calculate the energy eigenvalues for Klein-Gordon (KG) equation with Lorentz vector and/or Lorentz scalar potentials. Although it applies to any spherically symmetric potential, those that include Coulomb-like terms are only considered. Exact eigenvalues for a Lorentz vector or a Lorentz scalar, and an equally mixed Lorentz vector and Lorenz scalar Coulombic potentials are reproduced. Highly accurate and rapidly converging ground-state energies for Lorentz vector Coulomb with a Lorentz scalar linear potential, V(r)=-A1/r+kr, and S(r)=kr, respectively, are obtained. Moreover, a simple straightforward closed-form solution for a KG-particle in a Coulombic Lorentz vector and Lorentz scalar potentials is presented in appendix A.

math-ph↗

arXiv1999

Bound states for spiked harmonic oscillators and truncated Coulomb potentials

We propose a new analytical method to solve for the nonexactly solvable Schrodinger equation. Successfully, it is applied to a class of spiked harmonic oscillators and truncated Coulomb potentials. The utility of this method could be extended to study other systems of atomic, molecular and nuclear physics interest.

math-ph↗

arXiv1999

Quasi-relativistic harmonic bound states

The quasi-relativistic harmonic oscillator bound states constructed by Znojil (J. Phys. A: Math. Gen. 29 (1999)2905) are investigated via a new methodical proposal. Compared with those obtained by an anonymous referee (from a direct numerical integration method)of Znojil's paper, our results appear to be more favourable than those obtained by Znojil via quasi-perturbation, variational, Hill-determinant and Riccati-Pade' methods. Bound states with larger angular momenta l, are also constructed.

math-ph↗