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Primeur weekly 2014-10-20

Special

High Performance Computing Centre in Stuttgart to focus on Cloudification ...

Cash flow calculations using Monte Carlo simulations ...

The Cloud

IBM and SAP partner to accelerate enterprise Cloud adoption ...

EuroFlash

European Commission to launch survey on EU-Brazil co-operation in the area of ICT - Work Programme 2016-2017 ...

Big Data Value Association and European Commision sign Big Data Public Private Partnership ...

New forecasting method: Predicting extreme floods in the Andes mountains ...

Symposium on HPC and Data-Intensive Applications in Earth Sciences: Challenges and Opportunities@ICTP ...

Jülich renews co-operation with Oak Ridge National Laboratory ...

Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member ...

PRACE supports HPC for Health ...

HP and VMware dramatically simplify and accelerate the delivery of software-defined infrastructure services with EVO: RAIL ...

Supermicro highlights VMware EVO: RAIL, FatTwin Virtual SAN Ready nodes and NVIDIA GRID vGPU SuperServer at VMworld Barcelona ...

Calling on universities to submit their HPCAC-ISC 2015 Student Cluster Competition application ...

PRACE SHAPE and NSilico pool HPC knowledge to develop faster sequencing methods ...

A novel platform for future spintronic technologies ...

Future computers could be built from magnetic 'tornadoes' ...

USFlash

New SGI UV for SAP HANA enables real-time business for large enterprises ...

Cray adds new advanced analytics solution to its Big Data product portfolio ...

Australian teams set new records for silicon quantum computing ...

IBM announces first commercial application of IBM Watson in Africa ...

Among DOE supercomputing facilities, NERSC is at the forefront of data management and storage innovations ...

SC14 announces ACM/IEEE-CS George Michael HPC Fellowships ...

Fujitsu partners with Singapore to set up Centre of Excellence for sustainable urbanisation ...

UC Santa Cruz leads $11 million Center for Big Data in Translational Genomics ...

Australian volcanic mystery explained ...

Supermicro enhances VMware EVO: RAIL and Virtual SAN offerings with Nexenta ...

Dispelling a misconception about Mg-ion batteries ...

Australian teams set new records for silicon quantum computing


Dr. Stephanie Simmons, UNSW
13 Oct 2014 Sydney - Two research teams working in the same laboratories at the University of New South Wales (UNSW), Australia have found distinct solutions to a critical challenge that has held back the realisation of super powerful quantum computers. The teams created two types of quantum bits, or "qubits" - the building blocks for quantum computers - that each process quantum data with an accuracy above 99%. The two findings have been published simultaneously in the journalNature Nanotechnology.

"For quantum computing to become a reality we need to operate the bits with very low error rates", stated Scientia Professor Andrew Dzurak, who is Director of the Australian National Fabrication Facility at UNSW, where the devices were made.

"We've now come up with two parallel pathways for building a quantum computer in silicon, each of which shows this super accuracy", added Associate Professor Andrea Morello from UNSW's School of Electrical Engineering and Telecommunications.

The UNSW teams, which are also affiliated with the ARC Centre of Excellence for Quantum Computation & Communication Technology, were first in the world to demonstrate single-atom spin qubits in silicon, reported inNaturein 2012 and 2013.

Now the team led by Andrew Dzurak has discovered a way to create an "artificial atom" qubit with a device remarkably similar to the silicon transistors used in consumer electronics, known as MOSFETs. Post-doctoral researcher Menno Veldhorst, lead author on the paper reporting the artificial atom qubit, stated: "It is really amazing that we can make such an accurate qubit using pretty much the same devices as we have in our laptops and phones."

Meanwhile, Andrea Morello's team has been pushing the "natural" phosphorus atom qubit to the extremes of performance. Dr. Juha Muhonen, a post-doctoral researcher and lead author on the natural atom qubit paper, noted: "The phosphorus atom contains in fact two qubits: the electron, and the nucleus. With the nucleus in particular, we have achieved accuracy close to 99.99%. That means only one error for every 10,000 quantum operations."

Andrew Dzurak explained that, "even though methods to correct errors do exist, their effectiveness is only guaranteed if the errors occur less than 1% of the time. Our experiments are among the first in solid-state, and the first-ever in silicon, to fulfill this requirement".

The high-accuracy operations for both natural and artificial atom qubits is achieved by placing each inside a thin layer of specially purified silicon, containing only the silicon-28 isotope. This isotope is perfectly non-magnetic and, unlike those in naturally occurring silicon, does not disturb the quantum bit. The purified silicon was provided through collaboration with Professor Kohei Itoh from Keio University in Japan.

The next step for the researchers is to build pairs of highly accurate quantum bits. Large quantum computers are expected to consist of many thousands or millions of qubits and may integrate both natural and artificial atoms.

Andrea Morello's research team also established a world-record "coherence time" for a single quantum bit held in solid state. "Coherence time is a measure of how long you can preserve quantum information before it's lost", Andrea Morello stated. The longer the coherence time, the easier it becomes to perform long sequences of operations, and therefore more complex calculations.

The team was able to store quantum information in a phosphorus nucleus for more than 30 seconds. "Half a minute is an eternity in the quantum world. Preserving a 'quantum superposition' for such a long time, and inside what is basically a modified version of a normal transistor, is something that almost nobody believed possible until today", Andrea Morello stated.

"For our two groups to simultaneously obtain these dramatic results with two quite different systems is very special, in particular because we are really great mates", added Andrew Dzurak.

The quantum bit devices were constructed at UNSW at the Australian National Fabrication Facility, with support from researchers at the University of Melbourne and the Australian National University. The research was funded by the Australian Research Council, the US Army Research Office, the NSW Government, UNSW Australia and the University of Melbourne.
Source: University of New South Wales - UNSW

Back to Table of contents

Primeur weekly 2014-10-20

Special

High Performance Computing Centre in Stuttgart to focus on Cloudification ...

Cash flow calculations using Monte Carlo simulations ...

The Cloud

IBM and SAP partner to accelerate enterprise Cloud adoption ...

EuroFlash

European Commission to launch survey on EU-Brazil co-operation in the area of ICT - Work Programme 2016-2017 ...

Big Data Value Association and European Commision sign Big Data Public Private Partnership ...

New forecasting method: Predicting extreme floods in the Andes mountains ...

Symposium on HPC and Data-Intensive Applications in Earth Sciences: Challenges and Opportunities@ICTP ...

Jülich renews co-operation with Oak Ridge National Laboratory ...

Johannes Gutenberg University Mainz joins Germany's Gauss-Allianz as a full member ...

PRACE supports HPC for Health ...

HP and VMware dramatically simplify and accelerate the delivery of software-defined infrastructure services with EVO: RAIL ...

Supermicro highlights VMware EVO: RAIL, FatTwin Virtual SAN Ready nodes and NVIDIA GRID vGPU SuperServer at VMworld Barcelona ...

Calling on universities to submit their HPCAC-ISC 2015 Student Cluster Competition application ...

PRACE SHAPE and NSilico pool HPC knowledge to develop faster sequencing methods ...

A novel platform for future spintronic technologies ...

Future computers could be built from magnetic 'tornadoes' ...

USFlash

New SGI UV for SAP HANA enables real-time business for large enterprises ...

Cray adds new advanced analytics solution to its Big Data product portfolio ...

Australian teams set new records for silicon quantum computing ...

IBM announces first commercial application of IBM Watson in Africa ...

Among DOE supercomputing facilities, NERSC is at the forefront of data management and storage innovations ...

SC14 announces ACM/IEEE-CS George Michael HPC Fellowships ...

Fujitsu partners with Singapore to set up Centre of Excellence for sustainable urbanisation ...

UC Santa Cruz leads $11 million Center for Big Data in Translational Genomics ...

Australian volcanic mystery explained ...

Supermicro enhances VMware EVO: RAIL and Virtual SAN offerings with Nexenta ...

Dispelling a misconception about Mg-ion batteries ...