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Towards the fabrication of phosphorus qubits for a silicon quantum computer

J. L. O’Brien, S. R. Schofield, M. Y. Simmons, R. G. Clark, A. S. Dzurak, N. J. Curson, B. E. Kane, N. S. McAlpine, M. E. Hawley, and G. W. Brown
Phys. Rev. B 64, 161401(R) – Published 21 September 2001
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Abstract

The quest to build a quantum computer has been inspired by the recognition of the formidable computational power such a device could offer. In particular silicon-based proposals, using the nuclear or electron spin of dopants as qubits, are attractive due to the long spin relaxation times involved, their scalability, and the ease of integration with existing silicon technology. Fabrication of such devices, however, requires atomic scale manipulation — an immense technological challenge. We demonstrate that it is possible to fabricate an atomically precise linear array of single phosphorus bearing molecules on a silicon surface with the required dimensions for the fabrication of a silicon-based quantum computer. We also discuss strategies for the encapsulation of these phosphorus atoms by subsequent silicon crystal growth.

  • Received 21 March 2001

DOI:https://doi.org/10.1103/PhysRevB.64.161401

©2001 American Physical Society

Authors & Affiliations

J. L. O’Brien1,2,*, S. R. Schofield1,2, M. Y. Simmons1,2, R. G. Clark1,2, A. S. Dzurak1,3, N. J. Curson1,2, B. E. Kane4, N. S. McAlpine2,†, M. E. Hawley5, and G. W. Brown5

  • 1Centre for Quantum Computer Technology, University of New South Wales, Sydney 2052, Australia
  • 2School of Physics, University of New South Wales, Sydney 2052, Australia
  • 3School of Electrical Engineering & Telecommunications, University of New South Wales, Sydney 2052, Australia
  • 4Laboratory for Physical Sciences, University of Maryland, College Park, Maryland 20740
  • 5Los Alamos National Laboratory, Los Alamos, New Mexico 87545

  • *E-mail: job@phys.unsw.edu.au
  • Present address: School of Mathematical and Physical Sciences, University of Newcastle, Callaghan, New South Wales, 2308, Australia.

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Issue

Vol. 64, Iss. 16 — 15 October 2001

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