Single ion implantation in the quantum computer construction project

David N. Jamieson; Felicity Splatt; Chris I. Pakes; Changyi Yang; Paul G. Spizzirri; Steven D. Prawer; Fay E. Stanley; Victor Chan; Andrew S. Dzurak; Robert G. Clark

doi:10.1117/12.471924

13 November 2002 Single ion implantation in the quantum computer construction project

David N. Jamieson, Felicity Splatt, Chris I. Pakes, Changyi Yang, Paul G. Spizzirri, Steven D. Prawer, Fay E. Stanley, Victor Chan, Andrew S. Dzurak, Robert G. Clark

Author Affiliations +

Proceedings Volume 4936, Nano- and Microtechnology: Materials, Processes, Packaging, and Systems; (2002) https://doi.org/10.1117/12.471924
Event: SPIE's International Symposium on Smart Materials, Nano-, and Micro- Smart Systems, 2002, Melbourne, Australia

Abstract

The construction of micro- and nano-scale electronic devices that exploit the properties of single atoms have been proposed. A very promising device is a silicon based solid state quantum computer based on an array of single ³¹P atoms as qubits in a pure ²⁸Si substrate. Operation of the device requires independent control, coupling and readout of the state of individual qubits. We have developed a construction strategy for a few qubit device based on ion implantation of the qubits into prefabricated cells. An ion energy of less than 20 keV is necessary to ensure the ion range is at the required depth in the substrate which is of the order of 20 nm. Single ion impacts are registered by the electrical transient induced in an external circuit. Electron Beam Lithography fabricated cells, containing electrodes of the required nanometre scale, have been implanted with 14 keV ³¹P ions and the pulse height spectrum of single ion impacts has been successfully recorded. Discrimination on the pulse height allows rejection of ions that suffer unacceptable straggling. This opens the way to the rapid construction of a two qubit device in the first instance that will test many of the essential mechanisms of a revolutionary solid state quantum computer.

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David N. Jamieson, Felicity Splatt, Chris I. Pakes, Changyi Yang, Paul G. Spizzirri, Steven D. Prawer, Fay E. Stanley, Victor Chan, Andrew S. Dzurak, and Robert G. Clark "Single ion implantation in the quantum computer construction project", Proc. SPIE 4936, Nano- and Microtechnology: Materials, Processes, Packaging, and Systems, (13 November 2002); https://doi.org/10.1117/12.471924

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