News & Events

Connecting up the global quantum internet - 11/09/2017

CQC2T researchers at The Australian National University (ANU) have taken a major leap forward to provide practical building blocks for a global quantum internet.

The team, led by Associate Professor Matthew Sellars, have shown that an erbium-doped crystal is uniquely suited to enable a global telecommunications network that harnesses the weird properties of quantum mechanics.

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Precise quantum cloning: possible pathway to secure communication - 26/10/2016

CQC2T physicists at The Australian National University (ANU) and University of Queensland (UQ) have produced near-perfect clones of quantum information using a new method to surpass previous cloning limits.

A global race is on to use quantum physics for ultra-secure encryption over long distances according to Prof Ping Koy Lam, node director of the ARC Centre of Excellence for Quantum Computation and Communication Technology (CQC2T) at ANU. The new cloning method uses high performance optical amplifiers to clone light encoded with quantum information – it is possible this technique could allow quantum encryption to be implemented with existing fibre optic infrastructure.

“One obstacle to sending quantum information is that the quantum state degrades before reaching its destination. Our cloner has many possible applications, and could help overcome this problem to achieve secure long distance communication,” said Prof Lam.

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Quantum Fredkin Gate - 19/04/2016

Centre researchers at Griffith University and University of Queensland have overcome one of the key challenges to quantum computing by simplifying a complex quantum logic operation. They demonstrated this by experimentally realising a challenging circuit, the quantum Fredkin gate, for the first time.

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CQC2T's Partner Investigator, QuintessenceLabs Pty Ltd is successful in Priority Industry Capability Innovation Program Grant - 07/05/2012

Minister for Defence Materiel – More than $12 million investment in priority industry capabilities

30 April 2012

Minister for Defence Materiel Jason Clare today announced more than $12 million in matched funding is being offered to nine Australian companies to commercialise new defence technologies that will contribute to Australia’s Priority Industry Capabilities in the defence sector.

“This is an investment in cutting edge defence technologies developed here in Australia,” Mr Clare said.

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Sounds of Silence Proving a Hit. - 01/05/2012

Researchers at The Australian National University have developed the fastest random number generator in the world by listening to the ‘sounds of silence’.

The researchers – Professor Ping Koy Lam, Dr Thomas Symul and Dr Syed Assad from the ANU ARC Centre of Excellence for Quantum Computation and Communication Technology – have tuned their very sensitive light detectors to listen to vacuum – a region of space that is empty.

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Scientists Create a One-Atom Transistor - 16/04/2012

Physicists at the University of New South Wales have created a transistor composed of a single atom, which is an amazing feat of nanoengineering, and could provide a better foundation for scalable quantum computing. The technique and experiment have been published in Nature Nanotechnology.

The transistor itself is composed of a single phosphorous-31 isotope, which has been precisely placed on a base of silicon using a Scanning Tunneling Microscope in an ultra-high vacuum chamber.

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Physicists Create a Working Transistor From a Single Atom - 16/04/2012

Australian and American physicists have built a working transistor from a single phosphorus atom embedded in a silicon crystal. The group of physicists, based at the University of New South Wales and Purdue University, said they had laid the groundwork for a futuristic quantum computer that might one day function in a nanoscale world and would be orders of magnitude smaller and quicker than today’s silicon-based machines.

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Aussie Scientists Unveil Single-Atom Transistor. - 16/04/2012

A team of Australian physicists has created the world's first functioning single-atom transistor, which could prove a critical building block toward the development of super-fast computers.

The tiny electronic device, described today in a paper published in the journal Nature Nanotechnology, uses as its active component an individual phosphorus atom patterned between atomic-scale electrodes and electrostatic control gates.

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Photographic & Data Competition Winners - 05/01/2012

Congratulations to the winners of the photo and data competition. Your prize will be an $800 Apple voucher to spend at an Apple Store on a number of products you'd prefer, including an iPad 2 and an iPhone 4S. The winners will be contacted regarding their prize collection and recognition will be made during the Centre Workshop.

Thank you to all those who participated in the competition with images and data. We will compile a display of these for the Centre Workshop and will also be adding these to the website in the next couple of months.

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Ohm Run: One-Atom-Tall Wires Could Extend Life of Moore's Law - 05/01/2012

There may be a bit more room at the bottom, after all.

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Ohm's law holds down to atomic scale - 05/01/2012

A new technique for embedding atomic-scale wires within crystals of silicon has revealed that Ohm's law can hold true for wires just four atoms thick and one atom tall. The result comes as a surprise because conventional wisdom suggests that quantum effects should cause large deviations from Ohm's law for such tiny wires. Paradoxically, the researchers hope the finding will aid the development of quantum computers.

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World's thinnest wire a quantum leap forward - 05/01/2012

SYDNEY physicists have invented the world's narrowest silicon wire – 10,000 times thinner than a human hair – with the same capacity to conduct electricity as a traditional copper wire.

The nanowire, four atoms wide and one atom high, is a significant advancement for the team, which is part of an international race to build the world's first quantum computer.

These super-fast and super-powerful devices will be able to compute enormous amounts of data in seconds, calculations that would take today's computers years, even decades.

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Congratulations to Howard Wiseman on his election as a Fellow of the American Physical Society - 24/11/2011

The Council of the American Physical Society at its November 2011 meeting elected Prof. Howard Wiseman to Fellowship in the Society upon the recommendation of the Topical Group for Quantum Information.

Election to Fellowship in the American Physical Society is limited to no more than one half of one percent of the membership, and is recognition of outstanding contributions to physics.

Prof. Wiseman's citation is for seminal contributions to the quantum theory of measurement, particularly to the formulation of continuous measurement, feedback, and control.

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Simmons wins 2011 NSW Scientist of the Year - 23/11/2011

Scientia Professor Michelle Simmons, the Centre Director, a Federation Fellow and a Professor of Physics at The University of New South Wales was awarded the NSW Scientist of the Year Award by the Deputy Premier, the Honourable Andrew Stoner MP on 23rd November at Government House in Sydney.

In the past five years Professor Simmons has pioneered a radical technology for making electronic devices atom by atom in silicon. Her scientific vision has enabled the creation of the world's smallest precision transistor.

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Congratulations to Martin Füchsle for winning the 2011 Royal Society of New South Wales Award in Physics - 22/11/2011

Martin was awarded the 2011 Royal Society of New South Wales Award in Physics for his talk "From Single Atoms Toward the Most Powerful Computer". Martins supervisor is Michelle.

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Congratulations to Jarryd Pla for winning 1st prize in the 2011 Dean’s Award for Excellence in Postgraduate Research - 17/11/2011

The competition is open to students from the Faculty of Engineering at UNSW.

Jarryd is a Ph.D. student working the Quantum Spin Control Program at CQC2T under supervision of Dr. Andrea Morello

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Congratulations to Juan Pablo Dehollain for winning the 3rd IEEE Technologies of the Future (IToF) Competition - 17/11/2011

Juan Pablo presented a poster titled "A Nanoscale Microwave Transmission Line for Spin Qubit Control"

The event is a forum for future researchers and technology creators to showcase their work to judges from academia and industry. All universities across NSW participated in the event with a total of 29 entries (from postgraduate/undergraduate students and early career researchers). The event was sponsored by
IEEE NSW Section, element14, Dolby, CISRA, CSIRO and NICTA.

Juan Pablo is a Ph.D. student working the Quantum Spin Control Program at CQC2T under supervision of Dr. Andrea Morello

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Congratulations to Rachpon Kalra and Jason Cheng - Electrical Engineering Thesis Prize Winners - 16/11/2011

Two Centre research students have just been awarded 1st and 2nd prize in the highly competitive UNSW School of Electrical Engineering Thesis Poster Competition.

1st Prize: Rachpon Kalra
Thesis Topic: “Development of a Silicon Single-Atom Quantum Bit with Tuneable Readout Time”
Supervisor: Andrea Morello

2nd Prize: Chi Man (Jason) Cheng
Thesis Topic: “Control and Readout of a Quantum Dot Electron Spin Qubit”
Supervisor: Andrew Dzurak

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Defining Quantum Computing - 23/10/2011

The next big thing in computing is very small. Professor Michelle Simmons explains quantum computing, a field so complex that one pundit says you never fully understand - you just learn to live with it.

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Andrea Morello and Andrew Dzurak win UNSW Eureka Prize for Scientific Research - 06/09/2011

For their research in advancing the realisation of Quantum Computers, Scientia Professor Andrew Dzurak and Dr Andrea Morello of The University of New South Wales have won the 2011 Eureka Prize for Scientific Research. The prize is part of the Australian Museum Eureka Prizes, the most prestigious awards in Australian science. Dr Morello and Professor Dzurak have invented and patented a novel method to electrically read out the spin of a single electron attached to a single atom.

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Eureka Prize Finalists - 18/08/2011

The Australian Museum Eureka Prize finalists for Scientific Research in the area of Research and Innovation are:

The ANU Quantum Memory Team have set two world records for memory efficiency and shown how to build a random access quantum memory. Their work has implications for next generation computing and communication technology.

Dr. Ben Buchler
Australian National University, ACT

Mr Morgan Hedges
The Australian National University, ACT

Mr Mahdi Hosseini
The Australian National University, ACT

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ANU Media Release - Quantum encryption can go the distance - 13/06/2011

News from The Australian National University
Tuesday 14 June 2011

In a leap forward for long-distance communication and computer technology, a team of researchers from The Australian National University’s ARC Centre of Excellence for Quantum Computation and Communication Technology has worked out how to efficiently trap and then release light.

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Program Manager Geoff Pryde visits the University of Bristol for 2 months - 30/05/2011

30 May – 29 July 2011
Assoc. Professor Geoff Pryde from Griffith University visits the University of Bristol for 2 months to work the Centre for Quantum Photonics on combining quantum control techniques and quantum integrated photonics technology.

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Quantum sensor tracked in human cells could aid drug discovery - 25/05/2011

Groundbreaking research has shown a quantum atom has been tracked inside a living human cell and may lead to improvements in the testing and development of new drugs.

Quantum sensor tracked in human cells could aid drug discovery
Professor Lloyd Hollenberg from the University of Melbourne's School of Physics who led the research said it is the first time a single atom encased in nanodiamond has been used as a sensor to explore the nanoscale environment inside a living human cell.

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Nanoelectronics with germanium - 19/05/2011

Nanoelectronics with germanium
Germanium was the basic material of first-generation transistors in the late 1940s and early 1950s before it was replaced by silicon (the first silicon transistor was produced by Texas Instruments in 1954). Using germanium instead of silicon as transistor material would enable faster chips containing smaller transistors because higher switching speeds than in silicon could be achieved using germanium (and some other semiconductors).

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CQC2T Team at Griffith receive award for "Excellence of a Research Team" - 12/05/2011

The 2011 Vice Chancellor's Excellence of a Research Team Award has been won by a team of

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Scientists teleport Schrödinger's cat - 15/04/2011

Researchers from Australia and Japan have successfully teleported wave packets of light, potentially revolutionising quantum communications and computing.

The team, led by researchers at the University of Tokyo, say this is the first-ever teleportation, or transfer, of a particular complex set of quantum information from one point to another.

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Tim Ralph and Andrew White win Vice-Chancellors Senior Fellowships - 11/04/2011

Bugs to help clean up mining processes

A new collaborative initiative to deal with water technology issues in the minerals industry in Australia is one of 15 successful applications in two new University of Queensland internal fellowship schemes to foster research excellence.

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All-electrical single-electron shuttle in a silicon quantum dot - 04/04/2011

We report on single-electron shuttling experiments with a silicon metal-oxide-semiconductor quantum dot at 300 mK. Our system consists of an accumulated electron layer at the Si/SiO_2 interface below an aluminum top gate with two additional barrier gates used to deplete the electron gas locally and to define a quantum dot. Directional single-electron shuttling from the source and to the drain lead is achieved by applying a dc source-drain bias while driving the barrier gates with an ac voltage of frequency f_p.

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Partner Investigator John Morton visits UNSW for 1 month - 03/04/2011

3 April – 28 April 2011
John Morton from University of Oxford visits UNSW for 1 month to work with the silicon team on the single-donor spin resonance project.

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Optical Quantum Computation - 31/03/2011

We review the field of Optical Quantum Computation, considering the various implementations that have been proposed and the experimental progress that has been made toward realizing them. We examine both linear and nonlinear approaches and both particle and field encodings. In particular we discuss the prospects for large scale optical quantum computing in terms of the most promising physical architectures and the technical requirements for realizing them.

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High Nature ranking for Griffith University Researchers Wiseman and Pryde - 24/03/2011

Griffith climbs to seventh place in Nature ranking

Griffith University is ranked seventh in Australia and 30th in the Asia-Pacific region in the prestigious Nature Publishing Index 2010 released today.
Nature Publishing Index measures the output of research articles in the Nature family of journals — which include several of the most highly cited journals in the scientific literature.

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Sensing electric fields using single diamond spins - 17/03/2011

The ability to sensitively detect charges under ambient conditions would be a fascinating new tool benefitting a wide range of researchers across disciplines. However, most current techniques are limited to low-temperature methods like single-electron transistors (SET), single-electron electrostatic force microscopy and scanning tunnelling microscopy. Here we open up a new quantum metrology technique demonstrating precision electric field measurement using a single nitrogen-vacancy defect centre(NV) spin in diamond.

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Spin filling of valley-orbit states in a silicon quantum dot - 15/03/2011

We report the demonstration of a low-disorder silicon metal-oxide-semiconductor (Si MOS) quantum dot containing a tunable number of electrons from zero to N=27. The observed evolution of addition energies with parallel magnetic field reveals the spin filling of electrons into valley-orbit states. We find a splitting of 0.10 meV between the ground and first excited states, consistent with theory and placing a lower bound on the valley splitting. Our results provide optimism for the realization in the near future of spin qubits based on silicon quantum dots.

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Engineered valley-orbit splittings in quantum confined nanostructures in silicon - 25/02/2011

An important challenge in silicon quantum electronics in the few electron regime is the potentially small energy gap between the ground and excited orbital states in 3D quantum confined nanostructures due to the multiple valley degeneracies of the conduction band present in silicon. Understanding the "valley-orbit" (VO) gap is essential for silicon qubits, as a large VO gap prevents leakage of the qubit states into a higher dimensional Hilbert space. The VO gap varies considerably depending on quantum confinement, and can be engineered by external electric fields.

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Purdue University PhD student Sunhee Lee visits UNSW for 1 month - 23/01/2011

24 January - 21 February 2011
Purdue PhD student Sunhee Lee visits UNSW for 1 month to work with the silicon team.

He is modelling highly doped delta layers using NEMo-3D and is helping to understand transport in silicon quantum dots.

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Silicon quantum computer a possibility - 18/01/2011

Entanglement is at the heart of quantum information. However, harnessing and controlling it in a solid-state environment presents major challenges. Isotopically pure silicon is one of the most quiet and clean environments in which to prepare and exploit non-trivial quantum states of electron or nuclear spins. CQC2T Partner investigator John Morton and his group at Oxford University, with collaborators in Germany, Canada and Japan, have reported in Nature the ability to entangle the electron spin with the nuclear spin of an ensemble of phosphorus atoms in a silicon crystal.

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Entanglement-enhanced measurement of a completely unknown optical phase - 03/01/2011

Precise interferometric measurement is vital to many scientific and technological applications. Using quantum entanglement allows interferometric sensitivity that surpasses the shot-noise limit (SNL). To date, experiments demonstrating entanglement-enhanced sub-SNL interferometry, and most theoretical treatments, have addressed the goal of increasing signal-to-noise ratios. This is suitable for phase-sensing-detecting small variations about an already known phase.

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Nuclear spins as electronic memory - 17/12/2010

Electron spins are strong candidates with which to implement spintronics because they are both mobile and able to be manipulated. The relatively short lifetimes of electron spins, however, present a problem for the long-term storage of spin information.

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Squabbling spins in silicon - 27/10/2010

Quantum computers rely on materials with quantum bits - electron spins, for example - that persist (cohere) longer than the device’s operation times. Longer decoherence times mean lower error rates, and scientists are always on the lookout for materials with usable low-error regimes. Silicon is a prime candidate because one can reduce its concentration of nuclear spins - a source of magnetic noise that interferes with electron spins - by enriching certain isotopes.

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Quantum leap towards computer of the future - 27/09/2010

An Australian-led team of scientists have taken a big step forward in the race to develop a quantum computer.

Quantum computing relies on harnessing the laws of quantum physics, which includes laws that apply to particles smaller than an atom, in order to get a computer to carry out many calculations at the same time.

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Einstein's spooky theory could make quantum technologies secure - 20/09/2010

Griffith University physicists have shown that Einstein's theory of entangled particles could enhance security for tomorrow's quantum internet.

In a paper published this week in the top international physics journal Nature Physics, the research team at the University's Centre for Quantum Dynamics performed a series of new experiments on pairs of entangled particles, inspired by Einstein's old idea, which he termed "spooky action at a distance".

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Quantum crystal stops light in its tracks - 24/06/2010

Australian and New Zealand researchers have developed a device that brings light to a stop and releases, making it the most practical quantum memory yet developed.

The rare-earth crystal is four times more efficient than similar devices that store information as light and brings superfast quantum computing another step closer.

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Quantum leap: World's smallest transistor built with just 7 atoms - 08/06/2010

It can be used to regulate and control electrical current flow like a commercial transistor but it represents a key step into a new age of atomic-scale miniaturisation and super-fast, super-powerful computers. The discovery is reported today in the journal Nature Nanotechnology by a team from the UNSW Centre for Quantum Computer Technology (CQCT) and the University of Wisconsin-Madison.

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