Optimal Control of Quantum Rings by Terahertz Laser Pulses

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dc.creatorRasanen, E.
dc.creatorCastro, A.
dc.creatorWerschnik, J.
dc.creatorRubio, A.
dc.creatorGross, E. K. U.
dc.date2006-11-26
dc.date2007-03-16
dc.date.accessioned2026-07-07T09:37:38Z
dc.date.available2026-07-07T09:37:38Z
dc.descriptionComplete control of single-electron states in a two-dimensional semiconductor quantum-ring model is established, opening a path into coherent laser-driven single-gate qubits. The control scheme is developed in the framework of optimal control theory for laser pulses of two-component polarization. In terms of pulse lengths and target-state occupations, the scheme is shown to be superior to conventional control methods that exploit Rabi oscillations generated by uniform circularly polarized pulses. Current-carrying states in a quantum ring can be used to manipulate a two-level subsystem at the ring center. Combining our results, we propose a realistic approach to construct a laser-driven single-gate qubit that has switching times in the terahertz regime.
dc.descriptionPhys. Rev. Lett. (in print) (2007)
dc.identifierhttps://arxiv.org/abs/cond-mat/0611634
dc.identifierhttp://arxiv.org/abs/cond-mat/0611634
dc.identifierPhys. Rev. Lett. 98, 157404 (2007)
dc.identifierdoi:10.1103/PhysRevLett.98.157404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/160528
dc.subjectOther Condensed Matter
dc.titleOptimal Control of Quantum Rings by Terahertz Laser Pulses
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