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Charge-based quantum computing using single donors in semiconductors

L. C. L. Hollenberg·A. S. Dzurak·C. Wellard·A. R. Hamilton·D. J. Reilly·G. J. Milburn·R. G. Clark
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Abstract

Solid-state quantum computer architectures with qubits encoded using single atoms are now feasible given recent advances in atomic doping of semiconductors. Here we present a charge qubit consisting of two dopant atoms in a semiconductor crystal, one of which is singly ionised. Surface electrodes control the qubit and a radio-frequency single electron transistor provides fast readout. The calculated single gate times, of order 50ps or less, are much shorter than the expected decoherence time. We propose universal one- and two-qubit gate operations for this system and discuss prospects for fabrication and scale up.

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L. C. L. Hollenberg, A. S. Dzurak, C. Wellard, A. R. Hamilton, D. J. Reilly, G. J. Milburn, R. G. Clark. 2003-11-20. Charge-based quantum computing using single donors in semiconductors. https://doi.org/10.1103/physrevb.69.113301

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