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COLLABORATIONS
Collaboration
with other world-class institutions has been a cornerstone of the
Centre since its inception. In addition to strong linkages between
different nodes of the Centre, active collaborations with CSIRO, DSTO
and the ANU also continue. Academic exchange has provided valuable
experience to our students and young researchers, as well as more
efficiently exploiting our available resources by sharing of equipment
and technical expertise. The formal collaborations are summarised
below.
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Los Alamos
National Laboratory, USA
Los Alamos
National Laboratory (LANL) maintains a broad range of activities in quantum computing
and quantum information. Long-standing collaborations between UNSW and LANL have
been maintained through regular exchange visits of academic staff since 1996.
Links between Dr Marilyn Hawley's group at LANL and UNSW in the area of silicon
qubits date back to 2000. General quantum computing collaboration also extends
to joint work with the ion trap quantum computing group led by Dr Richard Hughes
and solid state and optical quantum computing theory studies led by Dr Daniel
James at LANL.
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Lawrence Berkeley Laboratory, USA
A team at the Lawrence Berkeley Laboratory
(LBL) led by Dr Thoms Schenkel is working on a project to dope semiconductors
with single ions, using complementary techniques to those developed within the
Centre. During 2005 single ion detection technology developed at UM and UNSW was
transferred to LBL for collaborative experiments with highly charged ions.
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University of Maryland, USA
The
Laboratory for Physical Sciences (LPS) at the University of Maryland has efforts
in both semiconductor spin-based and superconductor-based quantum computing. The
Centre has links with Dr Keith Schwab, who works on RF-SETs and nanomechanical
systems, as well as with Dr Bruce Kane, who moved to LPS following research at
UNSW from 1995-1999, during which he developed the concept of a Si-based QC. We
collaborate with Prof Sankar Das Sarma, Director of the Condensed Matter Theory
Center, U. Maryland. Prof Das Sarma was awarded a distinguished Miegunyah Fellowship
to visit Melbourne in 2005 to continue this collaboration and present an invited
keynote lecture at the 2005 AIP Congress.
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Hewlett Packard
Laboratories: Palo Alto, USA and Bristol, UK
We have maintained a close linkage with Hewlett Packard for a number
of years. In 2002 the Centre created three HP Fellowships and established the
HP Invent Centre at UNSW to investigate solid-state quantum computation. Drs Ray
Beausoleil, Tim Spiller and Bill Munro, senior research scientists from HP (USA)
and HP (UK), maintain close links with the Centre in the area of circuit QED,
as well as quantum properties of colour centres in diamond. In 2005 Milburn and
Sarovar worked with Dr Spiller to develop a model for homodyne detection of a
circuit QED field using a single electron transistor. Prof Milburn worked with
Dr Munro to develop a general theory for quantum bus qubit coupling and with Dr
Munro and Dr Kok to co-author a review of LOQC. Prof Milburn is also working with
Dr Spiller at HP Laboratories to develop a theory of decoherence in superconducting
qubit devices. LOQC-Theory PhD student Peter Rohde visited HP(UK) in 2005 to collaborate
with Dr Munro.
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IBM Research, USA
IBM has made a number of important breakthroughs in quantum computation,
including liquid state NMR and superconducting qubits. In 2004 IBM and CQCT signed
a Joint Study Agreement in the area of classical control electronics for qubit
devices, in which Prof Robert Clark (UNSW) collaborates with Dr Tom Theis, IBM's
Director of Physical Sciences and Dr Roger Koch, who is investigating flux-based
superconducting qubits. During 2005, the collaboration focused on low-temperature
CMOS control electronics for qubits.
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Harvard University,
USA
Prof Charles Marcus of Harvard
attended the Centre's Annual Workshop in February 2005 and links between our groups
have been strengthened by the appointment of our former PhD student, Dr David
Reilly, to a Research Fellowship within Marcus' group at Harvard. In January 2005,
Harvard doctoral student Michael Biercuk visited the UNSW node for 7 weeks to
work with UNSW researchers on fast charge sensing experiments involving carbon
nanotubes and rf-SETs, a technological precursor to similar experiments with silicon
based devices. A reciprocal visit by UNSW PhD student Victor Chan to Harvard followed
in October 2005.
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University of Illinois, USA
Prof Paul Kwiat at the University of Illinois is one of the world's
leading researchers in optical quantum information, and is one of the co-authors
with Prof Gerard Milburn of the US Road Map for Optical Quantum Computing. The
Linear Optical Quantum Computation (LOQC) group, headed by Dr Andrew White has
a longstanding and active collaboration with Kwiat's group. They are both partners
in a joint US-funded effort in the experimental realization of LOQC circuits.
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University of California at Santa Barbara, USA
The University of Queensland node maintains links with the group
of Dr David Awschalom at UCSB. This joint research is principally in quantum optics,
concentrating on colloidal quantum dots, cavity QED, quantum limited measurements
and single photon emission.
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University of California at
Berkeley, USA
Collaboration exists
between the Centre and Prof John Clarke's group at Berkeley to develop near
quantum limited charge detectors using cryogenic rf-SETs combined with rf-SQUID
amplifiers. In 2005 Dr Darin Kinion visited UNSW for over 2 weeks to work with
PhD student Nadia Court in a series of experiments in which a niobium SQUID amplifier
was coupled to a radio frequency single electron transistor in our dilution refrigerator.
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California Institute of Technology, USA
As part of a DARPA-funded grant on magnetic force resonance microscopy
(MRFM), Prof Milburn is working with the Roukes group at CIT to develop a theoretical
description of quantum electromechanical systems. Prof Howard Wiseman has long-standing
links and collaborations with the group of Hideo Mabuchi in quantum feedback control.
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Ohio State University, USA
Prof
Chris Hammel at OSU maintains close links with Centre researchers. His group is
working on direct spin detection techniques using Magnetic Resonance Force microscopy
at milli-Kelvin temperatures, which is of interest to realization of spin-based
qubits in silicon.
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University of Notre Dame, USA
Researchers at the University of Notre
Dame are leaders in quantum cellular automata (QCA). Prof Andrew Dzurak (UNSW)
maintains close links with Prof Gregory Snider (Notre Dame) in the area of Si:P-based
QCA. Dr Scott Glancy from Notre Dame collaborates with A/Prof Tim Ralph on the
theory of decoherence and error correction for coherent state quantum computation.
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Texas A & M University, USA
Dr
Phil Hemmer is a world expert on solid-state systems and has pioneered spectroscopic
approaches to quantum computing. His group is collaborating with Melbourne Node
on diamond-based QC. Prof Prawer (University of Melbourne) and Dr Hemmer are collaborating
to construct arrays of NV centres in diamond based on ion implantation technology.
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Louisiana State University, Baton Rouge, USA
Prof Milburn is working with Jon Dowling (also Paul Alsing at UNM)
to develop quantum simulations of non-inertial quantum field theory in an ion
trap QC architecture.
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European Community (FP6) Project Multi-National Collaborations
From 2006, the Centre will have collaborations
with the largest ever FP6 European Union research project in quantum information,
entitled “Qubit Applications' (or QAP for short), through Prof Jason Twamley
at Macquarie and Prof Gerard Milburn at UQ. The QAP project has 35 partners which
includes industrial partners such as HP, Toshiba, Pirelli Research Labs and ELSAG,
and academic partners such as Oxford University, Imperial College London, U. Bristol,
Ludwig Maximillians University in Germany, University of Geneva, Copenhagen University,
and the Austrian Academy of Sciences.
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University of Cambridge,
UK
The Centre has close affiliations
with the Semiconductor Physics Group at Cambridge, led by Professor Sir Michael
Pepper. In the area of optical quantum communication and computation UQ and UNSW
researchers are collaborating on the use of GaAs surface acoustic wave devices
as single photon sources, while UNSW researchers share common interests with the
Cambridge group in silicon-based QC devices. Prof Pepper visited UNSW for one
week in March 2005 and Prof Dzurak (UNSW) made a reciprocal visit to Cambridge
in June. Prof Milburn (UQ) has a collaboration with Dr Greg Hutchinson in the
Microelectronics Research Centre at the Cavendish Laboratory on readout in superconducting
qubits, while Profs Jamieson and Prawer (UM) are collaborating with Dr David Moore
in the Cambridge Engineering Department on the fabrication of nanoscale devices
using ion beam lithography. A/Prof Hollenberg (UM) collaborates with Dr Sonia
Schirmer, and Dr Daniel Oi in the Department of Applied Mathematics and Theoretical
Physics. Dr Schirmer visited UM in December 2005.
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University
of Oxford, UK
The Queensland Node
has links with Prof Ian Walmsley's quantum optics group at Oxford through the
Sixth Framework EU grant QAP. UQ PhD student Peter Rohde visited Prof Walmsley's
group in 2005. Further links have been established between Prof Andrew Briggs
and Prof Ian Walmsley's groups in Oxford and the Melbourne Node where a collaborative
program on quantum properties of diamond is underway.
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University
of Bristol, UK
A collaboration
between UQ and Prof John Rarity at the University of Bristol was started in 2003
through a Fifth Framework EU grant. Formerly a senior researcher at Qinetiq, Rarity
is one of the leading experimental researchers in optical quantum communication.
The project encompasses an existing collaboration with Dr Bill Munro at HP Laboratories
in Bristol.
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Queens University, Belfast, UK
A collaboration exists between A/Prof Tim Ralph at UQ and Prof M.
Kim at Queens University on creating resources for coherent state QC. Two Rapid
Communications in Physical Review A have been published as a result of this collaboration.
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University of Strathclyde, UK
Prof
David Pegg (Griffith) has long-standing and on-going collaborations with Prof
Stephen Barnett and co-workers on measurement and retrodiction in quantum mechanics,
work that has lead to a number of new LOQC experiments in the Centre.
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Kavli Institute of Nanoscience, TU Delft, The Netherlands
The Centre and the Nanoelectronics Group at the Kavli Institute share
a common interest in the study of Si nanoscale devices incorporating single phosphorus
dopants. In September 2005 Dr Chris Pakes (UM) visited Dr Sven Rogge at the Kavli
Institute, focussing on the development of a low temperature RF detection system
to probe spin in isolated P-dopant FinFET devices via noise spectrocopy. The visit
initiated a joint program of research in the physics of doped semiconductor systems
at the nanoscale, which aims to examine both silicon and diamond materials.
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University of Munich (LMU) & Walter Schottky Institute (WSI), Germany
A new initiative spearheaded by Prof Jorg
Kottahus (LMU) and Prof Gerhard Abstreiter (WSI) aims to develop a Cluster of
Excellence in Munich focussed on research in nanosystems at the interface between
information processing and nanobioscience. The initiative will greatly strengthen
existing collaborations and links between these institutes and the Centre. A/Prof
Lloyd Hollenberg and Dr Andrew Greentree at UM are collaborating with Prof Kotthaus'
group on the application of coherent transport ideas to quantum dot systems. Also
during 2005, electrical detection of magnetic resonance (EDMR) measurements were
carried out at WSI on silicon-based devices fabricated at UNSW with assistance
by Dr Jeff McCallum at UM. The measurement team included UNSW PhD student Dane
McCamey and Dr Wayne Hutchison (UNSW-ADFA), and Martin Brandt and Hans Huebl at
WSI.
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University of Erlangen, Germany
Collaboration continues between the group of Prof Gerd Leuchs at
the Institut fuer Optik, Information und Photonik, Max-Planck-Forschungsgruppe,
University of Erlangen-Nuenberg and Dr Elanor Huntington and A/Prof Tim Ralph
at the Queensland Node, on the analysis of quantum information carried on frequency
side-bands.
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University of Innsbruck, Austria
Prof Helmut Ritsch collaborates with Prof Milburn and A/Prof Ralph
on deterministic schemes for coherent state quantum computation resource production.
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University of Barcelona, Spain
Dr
Cameron Wellard of the Melbourne Node collaborates with Dr Roman Orus on adiabatic
quantum computation.
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vNiels Bohr Institute, University of
Copenhagen, Denmark
Prof Poul
Lindelof at the Neils Bohr Institute has interests including Kondo physics, carbon
nanotubes, single electron devices and surface acoustic waves. He interacts with
Centre researchers at UNSW and UQ in all of these areas.
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Slovak
Academy of Sciences, Slovakia
Prof
Jason Twamley at Macquarie U. has close ties with Prof Vladimir Buzek who leads
the Research Centre for Quantum Information in the Slovak Academy of Science,
Bratislava. This is formalized via a large European Commission research project
called Qubit Applications, on which Prof. Buzek is a partner.
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Technion,
Haifa, Israel
Steven Prawer (UM)
has a collaboration with the Technion. Joint projects include studies of charge
trapping in diamond and silicon dioxide (Alon Hoffman), electron emission properties
of diamond surfaces following ion beam irradiation (Rafi Kalish), and synthesis
of magnetic spin glasses and AlN/diamond heterojunctions and related devices (Joseph
Salzman).
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Perimeter Institute and University of Waterloo, Canada
Prof Milburn (UQ) has close ties with Dr Raymond Laflamme at the
Perimeter Institute in Waterloo, and the Center for Quantum Computation at U.
Waterloo. This encompasses a number of projects including a study of new quantum
algorithms for testing quantum systems. Prof Milburn is also a member of the International
Scientific Board for the Institute for Quantum Computing at U. Waterloo. A/Prof.
Lloyd Hollenberg (UM) has links with Prof Wilhlem at U. Waterloo. Dr Austin Fowler
(previously with our Melbourne Node) has taken up a postdoctoral position with
Prof Wilhlem from January 2006. Prof Howard Wiseman (Griffith) has on-going collaborations
with Dr Robert Spekkens at the Perimeter Institute on quantum measurement and
quantum information. Pacific Institute for Theoretical Physics (PiTP), University
of British Columbia, Vancouver, Canada. Prof Milburn (UQ) worked with Phillip
Stamp at PiTP to develop a scheme for implementing continuous time random walks
in arbitrary dimensions in an ion trap quantum computer. Prof Milburn and Prof
Stamp are also studying decoherence due to two level systems for Si:P charge qubits.
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National Institute for Informatics, Tokyo
Prof Milburn maintains links with A/Prof Kae Nemoto at the National
Institute for Informatics in Tokyo, largely around optical quantum computing.
In 2005 Prof Ralph visited the Institute. In 2005 Prof Milburn worked with Kae
Nemoto and Peter van Loock to develop a general theory for quantum bus qubit coupling.
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National Taiwan University, Taiwan
Prof Milburn (UQ) worked with Prof Hsi-Sheng Goan of NTU (and Spiller
at HP Bristol) in 2005 to develop a model for homodyne detection of a circuit
QED field using a single electron transistor. This model was then used to develop
a feedback scheme to generate entangled states of Cooper pair box qubits in a
planar waveguide.
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Nanyang Technological University, Singapore
The Melbourne Node maintains collaboration
with the School of Electrical and Electronic Engineering at NTU in Singapore on
the development of high performance X-ray emitters based on carbon nanotubes,
diamond-like carbon MEMS and ZnO.
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Australian National University
The
Centre maintains links with Prof Neil Manson's group at ANU, whose interests are
in colour centres of diamond, solid-state spectroscopy and rare earth approaches
to quantum computing. Prof Chennupati Jagadish leads the MOCVD group at the ANU,
and works with the UM node on applications of Deep Level Transient Spectroscopy
(DLTS) to characterization of defects in silicon. Dr Jeff McCallum and Prof David
Jamieson (UM) maintain links with Prof Robert Elliman at ANU. The Centre also
maintains close links with the ARC Centre of Excellence for Quantum-Atom Optics
at ANU, particularly between Prof Hans Bachor and A/Prof Ping Koy Lam at ANU and
Dr Andrew White and A/Prof Tim Ralph at the University of Queensland.
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DSTO, Defence Science and Technology Organisation
Collaboration continues between Dr David Pulford of DSTO and Dr Elanor
Huntington at UNSW@ADFA on the development of electro-optic systems for manipulating
quantum information on photons.
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CSIRO, Division of Telecommunications
& Industrial Physics
CSIRO
has acknowledged capability in superconductivity and SQUID devices and through
Dr Cathy Foley collaborate with Profs Clark and Dzurak at UNSW and Dr Chris Pakes
at UM on nano-SQUIDS for spin readout. During 2005 CSIRO co-supervised a final
year UNSW Electrical Engineering Thesis student (Kitty Lo) on this project.
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CSIRO, Division of Exploration and Mining
Dr Chris Ryan of CSIRO is working with Prof David Jamieson on the
development of the next generation nuclear microprobe forming lens system.
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Royal Melbourne Institute of Technology University
The University of Melbourne node is working with Prof Peter Johnston
on the use of ion beam analysis for the characterisation of advanced materials,
and with S. Russo on Density Functional Theory calculations.
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Nanostructural
Analysis Network Organisation (NANO)
The
Centre maintains important links with NANO (the Nanostructural Analysis Network
Organisation), in particular its nodes at the Electron Microscope Units at UNSW
and the University of Sydney. Prof Steven Prawer (UM) is an Associate Director
of NANO in charge of the Physical Sciences Panel. The Centre is especially supported
by the UNSW unit through high-resolution microscopy, focused ion beam milling
and student training.
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University of Sydney, School of Physics
Dr Stephen Bartlett of University of Sydney
collaborates with Prof Howard Wiseman and Dr Geoff Pryde (CQCT-Griffith) on the
theory of quantum measurement, nonlocality, and novel quantum effects for information
protocols.
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University of Newcastle, School of Physics
Prof Simmons and her group, in addition
to the theoretical modelling group at Sydney University collaborate with A/Prof
Smith, Dr Marrian Radny and Dr Steven Schofield from the University of Newcastle
on molecular dynamics modelling of the surface chemistry of phosphine on silicon.
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