WSEAS Transactions on Systems and Control
Print ISSN: 1991-8763, E-ISSN: 2224-2856
Volume 14, 2019
Optical Control of Initialization of a Quantum Dot in the Voigt Geometry Near a Graphene Layer
Authors: , , ,
Abstract: We propose and analyze fast spin initialization for a quantum dot in the Voigt geometry by placing it near a graphene layer. We show that high levels of fidelity, significantly larger than in the case of the quantum dot without the layer, can be quickly obtained due to the anisotropy of the enhanced spontaneous decay rates of the quantum dot near the graphene layer. We initially obtain these results by using a continuous wave optical field with constant control amplitude. We also use state of the art numerical optimal control to find the time-dependent electric field which maximizes the final fidelity for the same short duration as in the previous case. A better fidelity is obtained with this method.
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Keywords: Quantum control, numerical optimal control, quantum dot, spin initialization, Voigt geometry, optical pumping, spin dynamics
Pages: 300-305
WSEAS Transactions on Systems and Control, ISSN / E-ISSN: 1991-8763 / 2224-2856, Volume 14, 2019, Art. #38