O. Mustafa et M. Odeh, 2D H-atom in an arbitrary magnetic field via pseudoperturbation expansionsthrough the quantum number l, COMM TH PHY, 33(3), 2000, pp. 469-476
The pseudoperturbative shifted-l expansion technique is introduced to deter
mine nodeless states of the 2D Schrodinger equation with arbitrary cylindri
cally symmetric potentials. Exact energy eigenvalues and eigenfunctions for
the 2D Coulomb and harmonic oscillator potentials are reproduced. Moreover
, exact energy eigenvalues, compared with those obtained by numerical solut
ion (V.M. Villalba and R. Pine, J. Phys.: Condens. Matter 8 (1996) 8067), w
ere obtained for the hybrid of the 2D Coulomb and oscillator potentials.