We demonstrate that conditional as well as unconditional basic operations which are prerequisite for universal quantum gates can be performed with almost 100% fidelity within a strongly interacting two-electron quantum ring. Both sets of operations are based on a quantum control algorithm that optimizes a driving electromagnetic pulse for a given quantum gate. The demonstrated transitions occur on a time scale much shorter than typical decoherence times of the system.
@article{arxiv.1004.4126,
title = {Fundamental Gates for a Strongly Correlated Two-Electron Quantum Ring},
author = {Lene Sælen and Erik Waltersson and J. P. Hansen and Eva Lindroth},
journal= {arXiv preprint arXiv:1004.4126},
year = {2016}
}
Comments
4 pages, 4 figures, copyright 2010 The American Physical Society