3 papers
cond-mat.mes-hall2021
Effect Of Coulomb Interactions on The Amplitude Of Persistent Currents In One Dimensional Disordered Mesoscopic Metallic Rings
R. O. Okanigbuan, K. N. Onaiwu, S. Ehika
Persistent current is a small but perpetual electric current that flows in metallic rings in the absence of any applied source. We compute the persistent currents of one-dimensiona…
cond-mat.str-el2021
Ground State Properties Of The One-Dimensional Hubbard Model: Symmetry Projected Variational Wave Function Approach
Robinson O. Okanigbuan, Kingsley N. Onaiwu
We use the symmetry group of the 4-site Hubbard model to construct a ground state variational wave function of two- and four interacting electrons. In the limit $U\rightar…
cond-mat.str-el2017
Possibility of hole confinement in the weak coupling regime of one dimensional ising antiferromagnet and the emergence of spin-charge separation in the bulk limit
Simon Ehika, Robinson Okanigbuan, John Idiodi
The energy of one hole in one dimensional Ising antiferromagnet is calculated using exact diagonalization (ED) method on finite systems with number of sites N ranging from 4 to 50.…