v 1 2 6 M ay 1 99 4 Suppression of persistent currents in 1 - D disordered rings by Coulomb interaction

ar X iv : c on d - m at / 9 40 90 38 v 1 9 S ep 1 99 4 Enhancement of Persistent Currents by the Coulomb Interaction

The persistent current in three-dimensional mesoscopic rings is investigated numerically. The model is tight-binding one with random site-energies and interaction between electrons. The Hartree-Fock approximation is adopted for the interaction between electrons, and models with up to 3 × 4 × 40 sites are investigated. It is shown that the long-range Coulomb interaction enhances the persistent c...

4 F eb 1 99 8 Addition spectrum , persistent current , and spin polarization in coupled quantum dot arrays : coherence , correlation , and disorder

The ground state persistent current and electron addition spectrum in two-dimensional quantum dot arrays and one-dimensional quantum dot rings, pierced by an external magnetic flux, are investigated using the extended Hubbard model. The collective multidot problem is shown to map exactly into the strong field noninteracting finite-size Hofstadter butterfly problem at the spin polarization trans...

- th / 9 80 50 28 v 1 1 5 M ay 1 99 8 The Coulomb Interaction between Pion - Wavepackets : The π + – π − Puzzle

Enhancement of Persistent Currents by Hubbard Interactions In Disordered 1D Rings: Avoided Level Crossings Interpretation

We study effects of local electron interactions on the persistent current of one dimensional disordered rings. For different realizations of disorder we compute the current as a function of Aharonov-Bohm flux to zeroth and first orders in the Hubbard interaction. We find that the persistent current is enhanced by onsite interactions. Using an avoided level crossings approach, we derive analytic...

Coulomb Drag in Mesoscopic Rings Typeset Using Revt E X

We develop a Luttinger liquid theory of the Coulomb drag of persistent currents flowing in concentric mesoscopic rings, by incorporating non-linear corrections to the electron dispersion relation. We demonstrate that at low temperatures, interactions between electrons in different rings generate an additional phase and thus alter the period of Aharonov-Bohm oscillations. We also show that inter...