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Time dependent quantum simulations of two-qubit gates based on donor states in silicon

Kerridge, A; Savory, S; Harker, AH; Stoneham, AM; (2006) Time dependent quantum simulations of two-qubit gates based on donor states in silicon. J PHYS-CONDENS MAT , 18 (21) S767 - S776. 10.1088/0953-8984/18/21/S04. Green open access

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Abstract

Many quantum gate proposals make physical assumptions to ease analysis. Here we explicitly consider the effect of these assumptions for a particular two-qubit gate proposal, a cube-root-of-unity gate, in which the two qubits are donors in a semiconductor coupled via an intermediate 'control' spin. Our approach considers directly the electronic structures of the qubit and control impurity systems. We find that such gates are highly sensitive to environmental factors overlooked in analytically soluble models, but that there are regimes in which simplifying assumptions are valid and lead to high fidelity gates.

Type: Article
Title: Time dependent quantum simulations of two-qubit gates based on donor states in silicon
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/0953-8984/18/21/S04
Publisher version: http://dx.doi.org/10.1088/0953-8984/18/21/S04
Language: English
Additional information: Text made available to UCL Discovery by kind permission of IOP Publishing, 2012
Keywords: SELF-CONSISTENT CALCULATIONS, SHALLOW DEFECTS, SEMICONDUCTORS, COMPUTATION
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/157447
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