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Title: On the nuclear magnetic resonance frequency of phosphorus donor atom in a silicon-based quantum computer
Authors: Mirzaei, H.
Hui, H.T. 
Issue Date: 1-Nov-2010
Citation: Mirzaei, H., Hui, H.T. (2010-11-01). On the nuclear magnetic resonance frequency of phosphorus donor atom in a silicon-based quantum computer. Journal of Applied Physics 108 (9) : -. ScholarBank@NUS Repository.
Abstract: The nuclear magnetic resonance (NMR) frequency of a single qubit structure of Kane's solid-state quantum computer is investigated by using the perturbation theory. With higher-order excited states (up to 3d modes) included in our calculation, the perturbation frequencies and energies are obtained numerically. To compute for arbitrary A gate geometries, the perturbation potential inside the qubit structure is determined through an electromagnetic simulation method. Calculations show that the potential distributions for realistic A gate geometries are far from linear ones. Our results show that the A gate voltage has a much more effective control over the NMR frequency of the phosphorus nucleus than that previously shown. Using our method, arbitrary A gate structures of any shapes or geometries can be engineered for the realization of a solid-state scalable quantum computer. We also investigate an alternative A gate structure using SiGe as the insulation barrier. Our study shows that this A gate structure offers a much more efficient utilization of the control voltage than the original A gate structure using SiO2 as the insulation barrier. © 2010 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.3504653
Appears in Collections:Staff Publications

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