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Primeur weekly 2013-08-05

Special

There is room for two major supercomputer conferences each year ...

Historic Heidelberg setting for new Big Data Conference ...

Exascale supercomputing

Largest neuronal network simulation to date achieved using Japanese supercomputer ...

Designing a new operating system for exascale architectures ...

The Cloud

Over a hundred vulnerabilities were found in browsers in the course of The University of Oulu's effective data security testing programme ...

IBM unveils new PowerLinux system for analytics and Cloud computing ...

ESDS selects IBM PureSystems over HP and Dell for Cloud and Big Data offerings ...

EuroFlash

Walking on Water: projectiondesign powers interactive portable 360-degree Igloo experience at La Biennale di Venezia 2013 ...

SUSE predicts supercomputer capabilities to become part of mainstream IT for enterprise customers ...

GEANT's terabit upgrade gives European science the data network of the future ...

ADVA FSP 150 delivers sub-microsecond timing for high-frequency trading ...

Scientists realize quantum bit with a bent nanotube ...

USFlash

Stanford engineers receive award to improve supercomputing and solar efficiency ...

Fujitsu PRIMERGY computational power at Australian National University takes high capability Australian research to the world stage ...

NOAA's National Weather Service more than doubles computing capacity ...

Cray Inc. reports second quarter 2013 results ...

UCSC acquires powerful new astrophysics supercomputer system ...

20 years of TOP500 data show Linux's role in supercomputing breakthroughs ...

Secretary Moniz dedicates new supercomputer at the National Energy Technology Laboratory ...

Online tools accelerating earthquake-engineering progress ...

CSIR to launch new supercomputer ...

NIH commits $24 million annually for Big Data Centres of Excellence ...

NASA relies on RTI Connext DDS for Human Exploration Telerobotics Project ...

Omni Circuit Boards produces working aluminum trace circuit board for quantum computing applications ...

Computer scientists develop mathematical jigsaw puzzles to encrypt software ...

Scientists realize quantum bit with a bent nanotube


29 Jul 2013 Amsterdam - One of the biggest challenges in quantum science is to build a functioning quantum bit, the basic element for the quantum computer. An important theoretical candidate for such a quantum bit is using a bent carbon nanotube. Scientists at the Delft University of Technology and the Foundation for Fundamental Research on Matter (FOM), led by FOM focus group leader Prof.dr.ir. Leo Kouwenhoven, have succeeded for the first time to create a working quantum bit using a carbon nanotube. FOM PhD student Fei Pei carried out part of the measurements. On 28 July they published their results inNature Nanotechnology.

Quantum computers have the advantage that they can be much faster than 'ordinary' supercomputers for various calculations. An ordinary computer bit has the value '1' or '0', but a quantum bit uses the state of a single electron, which due to the extraordinary properties of the quantum world can take ​​ both values at the same time. "We call that a 'superposition''', stated FOM PhD student Fei Pei who carried out part of the measurements. "The main problem that quantum physicists have to deal with is that the superposition can be disturbed quickly by external factors, for instance by other particles around the quantum bit."

Carbon nanotubes of a few nanometers in diameter have exceptional properties that make them a very suitable material for hosting quantum bits, but so far no one could manipulate and 'read' a single electron in a nanotube. The scientists have achieved that. They were inspired by the work of colleagues from Copenhagen who showed in 2010 theoretically that the quantum state of an electron can be controlled in a bent nanotube, and carried on their own work from 2012. Back then they showed how to read the electron quantum states in a nanotube. Putting both ideas together created a 'functioning' quantum bit.

"The next challenge would be to improve the stability of this quantum bit as currently we can not maintain the superposition state long enough", stated Fei Pei. "We will now focus on reducing the disturbance, so to extend the lifetime of the superposition."

The research group of Prof.dr.ir. Leo Kouwenhoven is focusing on a number of possible 'candidates' of a functioning and stable quantum bit. Carbon nanotube is one of the candidates. Another part of the research is focused on making a quantum bit based on the renowned Majorana particles, previously demonstrated by the same group. Further research will show which candidate is the best.

The paper. titled "A valley-spin qubit in a carbon nanotube", by Edward Laird, Fei Pei, and Leo Kouwenhoven has appeared inNature Nanotechnologyadvanced on-line publication of 28 July 2013.

Source: Foundation for Fundamental Research on Matter - FOM

Back to Table of contents

Primeur weekly 2013-08-05

Special

There is room for two major supercomputer conferences each year ...

Historic Heidelberg setting for new Big Data Conference ...

Exascale supercomputing

Largest neuronal network simulation to date achieved using Japanese supercomputer ...

Designing a new operating system for exascale architectures ...

The Cloud

Over a hundred vulnerabilities were found in browsers in the course of The University of Oulu's effective data security testing programme ...

IBM unveils new PowerLinux system for analytics and Cloud computing ...

ESDS selects IBM PureSystems over HP and Dell for Cloud and Big Data offerings ...

EuroFlash

Walking on Water: projectiondesign powers interactive portable 360-degree Igloo experience at La Biennale di Venezia 2013 ...

SUSE predicts supercomputer capabilities to become part of mainstream IT for enterprise customers ...

GEANT's terabit upgrade gives European science the data network of the future ...

ADVA FSP 150 delivers sub-microsecond timing for high-frequency trading ...

Scientists realize quantum bit with a bent nanotube ...

USFlash

Stanford engineers receive award to improve supercomputing and solar efficiency ...

Fujitsu PRIMERGY computational power at Australian National University takes high capability Australian research to the world stage ...

NOAA's National Weather Service more than doubles computing capacity ...

Cray Inc. reports second quarter 2013 results ...

UCSC acquires powerful new astrophysics supercomputer system ...

20 years of TOP500 data show Linux's role in supercomputing breakthroughs ...

Secretary Moniz dedicates new supercomputer at the National Energy Technology Laboratory ...

Online tools accelerating earthquake-engineering progress ...

CSIR to launch new supercomputer ...

NIH commits $24 million annually for Big Data Centres of Excellence ...

NASA relies on RTI Connext DDS for Human Exploration Telerobotics Project ...

Omni Circuit Boards produces working aluminum trace circuit board for quantum computing applications ...

Computer scientists develop mathematical jigsaw puzzles to encrypt software ...