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Quantum information processing using localized ensembles of nuclear spins

J. M. Taylor·G. Giedke·H. Christ·B. Paredes·J. I. Cirac·P. Zoller·M. D. Lukin·A. Imamoglu
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Abstract

We describe a technique for quantum information processing based on localized en sembles of nuclear spins. A qubit is identified as the presence or absence of a collective excitation of a mesoscopic ensemble of nuclear spins surrounding a single quantum dot. All single and two-qubit operations can be effected using hyperfine interactions and single-electron spin rotations, hence the proposed scheme avoids gate errors arising from entanglement between spin and orbital degrees of freedom. Ultra-long coherence times of nuclear spins suggest that this scheme could be particularly well suited for applications where long lived memory is essential.

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J. M. Taylor, G. Giedke, H. Christ, B. Paredes, J. I. Cirac, P. Zoller, M. D. Lukin, A. Imamoglu. 2004-07-23. Quantum information processing using localized ensembles of nuclear spins. https://arxiv.org/abs/cond-mat/0407640

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