Quantum Information Protectorates in Coupled Quantum Dot Exchange Gates
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
Using exact diagonalization we study the low energy Hilbert space of the two-electron, two-quantum dot artificial molecule under a perpendicular magnetic field. We show that electrons bind to vortices to induce several spin transitions among ground states. Furthermore, the lowest excited states of either even or odd vorticity mix, opening an anticrossing which protects the quantum information stored in the spin states of the strongly correlated quantum dot molecule.
Cite
@article{arxiv.cond-mat/0311463,
title = {Quantum Information Protectorates in Coupled Quantum Dot Exchange Gates},
author = {V. W. Scarola and S. Das Sarma},
journal= {arXiv preprint arXiv:cond-mat/0311463},
year = {2007}
}
Comments
5 pages, 3 figures