Localization and entanglement of two interacting electrons in a double quantum dot
Ping Zhang, Xian-Geng Zhao · Journal of Physics Condensed Matter · 2001
We study the coherent control of two interacting electrons in a coupled-quantum-dot system with external electric fields. The localization and entanglement of the two electrons are demonstrated through analytic and numerical calculations of the populations of the three two-particle states. We show that the maximally entangled Bell state can be prepared and maintained with a pulse of an oscillatory electric field. Although the effective Coulomb repulsion between the two electrons is very strong, dynamical localization can fully build up in the system parameter manifold which corresponds to the exact crossing of the quasienergies developed from the unperturbed nearly degenerate levels.