Property of one-dimensional Coulomb interaction and its possible contribution to strongly correlated systems

The unique property of Coulomb interaction in strict one-dimensional (1D) system is revealed that the Coulomb repulsion energy of paired electrons is divergent. As consequences, electrons in 1D system can not doubly occupy the same spatial orbital and are completely localized. Numerical simulation by time dependent Hartree-Fock approximation shows this distinct property. The ‘0.7 anomaly’ in 1D electron gas is fully explained by the property. Its possible contribution to strongly correlated systems is discussed.