Centre of Excellence - Centre for Quantum Computer Technology  

The director of the Melbourne Node of the CQCT is Prof. David Jamieson

Mission Objectives and Goals

The goal of the Melbourne node of the Centre of Excellence - Centre for Quantum Computer Technology (CQCT) is to develop technologies for the placement and detection of Phosphorus atoms in Silicon as part of the realization of a prototype Kane quantum computer, and theoretical modelling of gate operations.

The key strategies for achieving this goal are:

  • The use of direct ion implantation for the placement of P atoms.
  • Registration of the P atoms using resists or electrical transients.
  • Detection of single P atoms using scanning probe microscopies.
  • Design methods of monitoring ultra-low levels of damage in Si and optimization of procedures for the removal of damage.
  • Modeling of the implantation process and device performance.

The key infrastructure to be used at the University of Melbourne includes:
  • Variable temperature, ultrahigh-vacuum Scanning Tunneling and Atomic Force Microscope.
  • Single P ion implanter
  • Pelletron accelerator and ion microprobe.
  • Focused ion beam source.
  • Near field probe.

The key experimental objectives (2001-2003) are:

  • Demonstration of on-chip detection of keV P ions.
  • Demonstration of the signature of P atoms on or buried below Si surfaces. This is to be accomplished by the use of low energy ion implantation followed by imaging using the Scanning Probe Microscope.
  • Demonstration of feasibility of a step/repeat method for the realization of arrays of precisely placed P atoms on Si surfaces.
  • Evaluation of the local environment of the buried P atom using deep level transient spectroscopy, and investigation of ion tracks.
  • Development of alternative methods of single spin detection using miniature SQUIDS and diamond based optical centres.


Created: 21 Feb, 2003
Last modified: 13 March 2003
Authorised by: Prof. David Jamieson
Maintained by: MARC office admin., Physics Department
Email: marcadm@physics.unimelb.edu.au