Fundamental Gates for a Strongly Correlated Two-Electron Quantum Ring

Details Fundamental Gates for a Strongly Correlated Two-Electron Quantum Ring Fundamental Gates for a Strongly Correlated Two-Electron Quantum Ring

2010-04-23

arxiv.org/abs/1004.4126v2

Phys. Rev. B 81, 033303 (2010), http://link.aps.org/doi/10.1103/PhysRevB.81.033303

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, copyright 2010 The American Physical Society

Scientific paper

10.1103/PhysRevB.81.033303

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.

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