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Current News
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M. Fuechsle, S. Mahapatra, F.A. Zwanenburg,
M. Friesen, M.A. Eriksson and M.Y. Simmons, "Spectroscopy of few-electron single-crystal
silicon quantum dots", Nature Nanotechnology, published online 23 May2010 Abstract
doi:10.1038/nnano.2010.95
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Tiny Dot Speeds Hi-Tech Future
Sydney Morning Hearld, 24 May 2010
Scientists have created a transistor in a computer chip that is 10 times smaller than those commonly in use now, marking the start of a new age of super-fast, super-powerful computing. Article
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Seven Atom Transistor sets the Pace for Future PCs
BBC News, 24 May 2010
Researchers have shown off a transistor made from just seven atoms that could be used to create smaller, more powerful computers. Article
Image: Blackwood/Getty
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Quantum Leap: World's Smallest Transistor Built with Just 7 Atoms
Nanotechnology, 24 May 2010
Scientists have literally taken a leap into a new era of computing power by making the world's smallest precision-built transistor - a "quantum dot" of just seven atoms in a single silicon crystal. Despite its incredibly tiny size - a mere four billionths of a metre long - the quantum dot is a functioning electronic device, the world's first created deliberately by placing individual atoms. Article
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Heralded Noiseless Linear Amplification & Distillation of Entanglement
Nature Photonics, 28 March 2010
CQCT researchers have developed a heralded scheme for avoiding the quantum noise that usually results from amplifying an optical signal. The heralded nature of the device makes it possible to readily isolate successful noiseless amplification from failed attempts. The noiseless amplifier wasused in a demonstration of field-mode entanglement
distillation, highlighting the fact that application to quantum technology protocols such as continuous-variables quantum key distribution and other quantum photonic technologies will be possible in the near future.
G.Y. Xiang, T.C. Ralph, A.P. Lund, N. Walk &
G.J. Pryde, "Heralded noiseless linear amplification and distillation of entanglement", Nature Photonics 4, 316 (2010). Abstract
doi:10.1038/nphoton.2010.35
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New Quantum Computing Director Appointed
UNSW Faculty of Science, 21 May 2010
UNSW is pleased to announce the appointment of Professor Michelle Simmons as Director of one of the university's largest and most high-profile research initiatives - the Centre for Quantum Computer Technology (CQCT). Article
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Surface Code Quantum Communication
Physical Review Letters, 7 May 2010
Quantum communication typically involves a linear chain of repeater stations, each capable of reliable local quantum computation and connected to their nearest neighbors by unreliable communication links. The communication rate of existing protocols is low as two-way classical communication is used. By using a surface code across the repeater chain and generating Bell pairs between neighboring stations with probability of heralded success greater than 0.65 and fidelity greater than 0.96, we show that two-way communication can be avoided and quantum information can be sent over arbitrary distances with arbitrarily low error at a rate limited only by the local gate speed.
A.G. Fowler, AG, D.S. Wang, C.D. Hill, T.D. Ladd,
R. Van Meter and L.C.L. Hollenberg, "Surface Code Quantum Communication", Physical Review Letters
104,180503 (2010). Abstract
doi:10.1103/PhysRevLett.104.180503
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A Smoother Quantum Measurement
American Physical Society -
Spotlighting Exceptional Research, 3 March 2010
The precision of any measurement is fundamentally limited by the standard quantum limit. Often there are classical quantities related to the dynamical evolution of a quantum system one would like to measure, a process known as quantum parameter estimation. This kind of estimation is useful in delicate measurements ranging from gravitational wave detection to quantum computation. Recently, Tsang [1] considered the case of quantum estimation for dynamical systems and proposed a method called quantum smoothing that combines past observations with “future” measurements (that is, a signal is inferred from measurements both before and after a chosen point in time). Article
T.A. Wheatley, D.W. Berry, H. Yonezawa, D.Nakane, H. Arao, D.T. Pope, T.C. Ralph,
H.M. Wiseman, A. Furusawa, and E.H. Huntington, "Adaptive Optical Phase Estimation Using Time-Symmetric Quantum Smoothing", Physical Review Letters 104, 093601 (2010). Abstract
doi:10.1103/PhysRevLett.104.093601
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Towards Quantum Chemistry on a Quantum Computer
Nature Chemistry, 10 January 2010
This paper reports on the application of the latest photonic quantum computer technology to calculate properties of the smallest molecular system: the hydrogen molecule. We calculate the complete energy spectrum to 20 bits of precision and discuss how the technique can be expanded to solve large-scale chemical problems that lie beyond the reach of modern supercomputers.
B.P. Lanyon, J.D. Whitfield, G.G. Gillett, M.E. Goggin, M.P. Almeida, I. Kassal, J.D. Biamonte, M. Mohseni, B.J. Powell, M. Barbieri, A. Aspuru-Guzik & A.G. White, "Towards quantum chemistry on a quantum computer", Nature Chemistry 2, 106 (2010). Abstract
doi:10.1038/nchem.483
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Applied Physics Letters Cover
16 December 2009
W.H. Lim, F.A. Zwanenburg, H. Huebl, M. Mottonen, K.W. Chan, A. Morello and A.S. Dzurak, “Observation of the single-electron regime in a highly tunable silicon quantum dot”, Applied Physics Letters 95, 242102 (2009). Abstract
doi:10.1063/1.3272858
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Single-Atom Transistor Discovered
Nanotechnology Now, 3 December 2009
Researchers from Helsinki University of Technology (Finland), University of New South Wales (Australia), and University of Melbourne (Australia) have succeeded in building a working transistor, whose active region composes only of a single phosphorus atom in silicon. The results have just been published in Nano Letters. Article
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13 January 2007
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You Talking to Me? Article on Solid Light.
New Scientist |
19 April 2007
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Introduction to Quantum Computers. Interview with Prof D.N. Jamieson.
World Conference of Science Journalists |
29 April 2007
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The Brain Gain.
Advertiser |
01 May 2007
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Invest Australia - Nanotechnology - Australian Capability Report, Third Edition.
Australian Government |
07 July 2007
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How To Make the Smallest Things on Earth.
Australasian Science |
16 August 2007
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From Lab to the Limelight.
Sydney Morning Herald |
1 September 2007
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Mentors Make all the Difference.
Sydney Morning Herald |
29 September 2007
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Quantum Bodies for Here or There, But Not In Between.
New Scientist |
01 November 2007
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Quantum Leap.
Research@UNSW |
01 November 2007
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Quantum Optics: Kittens Catch Phase.
Review in Nature 450, pp362-363 |
21 November 2007
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No Size Too Tiny to Gauge.
The Australian - Higher Education |
30 November 2007
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Precision Without Entanglement.
Science Magazine |
13 December 2007
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The Top 100 Sydney's Most Influential People. (Prof M.Y. Simmons).
The Sydney Magazine |
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