Browsing Department of Physics by Subject "SYSTEMS, PHYSICS, MATHEMATICAL"

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

Barakat, Thabit; Maen, Odeh; Mustafa, Omar (IOP PUBLISHING LTD, 1998)

A shifted-l expansion technique is introduced to calculate the energy eigenvalues for the Klein-Gordon (KG) equation with Lorentz vector and/or Lorentz scalar potentials. Although it applies to any spherically symmetric ...
Position-dependent mass Lagrangians: nonlocal transformations, Euler-Lagrange invariance and exact solvability

Mustafa, Omar (IOP Publishing, 2015)

A general nonlocal point transformation for position-dependent mass (PDM) Lagrangians and their mapping into a 'constant unit-mass' Lagrangians in the generalized coordinates is introduced. The conditions on the invariance ...