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28 March 2024
 
  » arxiv » cond-mat/0102228

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Isotopically engineered silicon/silicon-germanium nanostructures as basic elements for a nuclear spin quantum computer
I. Shlimak ; V.I. Safarov ; I.D. Vagner ;
Date 13 Feb 2001
Subject Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall
AbstractThe idea of quantum computation is the most promising recent developments in the high-tech domain, while experimental realization of a quantum computer poses a formidable challenge. Among the proposed models especially attractive are semiconductor based nuclear spin quantum computer’s (S-NSQC), where nuclear spins are used as quantum bistable elements, ’’qubits’’, coupled to the electron spin and orbital dynamics. We propose here a scheme for implementation of basic elements for S-NSQC’s which are realizable within achievements of the modern nanotechnology. These elements are expected to be based on a nuclear-spin-controlled isotopically engineered Si/SiGe heterojunction, because in these semiconductors one can vary the abundance of nuclear spins by engineering the isotopic composition. A specific device is suggested, which allows one to model the processes of recording, reading and information transfer on a quantum level using the technique of electrical detection of the magnetic state of nuclear spins. Improvement of this technique for a semiconductor system with a relatively small number of nuclei might be applied to the manipulation of nuclear spin ’’qubits’’ in the future S-NSQC.
Source arXiv, cond-mat/0102228
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