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Primeur weekly 2015-07-06

Special

Moving up to an Open Science Commons ...

HPC in the Baltic region ...

Data Access helps its customers get the most out of their HPC investments ...

The importance of being earnest about the long tail of research ...

Comstor to simply the IP management of clusters ...

Arbor Networks to protect organisations against DDoS attacks ...

Open Science perspective highlighted at e-IRG workshop in Riga ...

Focus on Europe

IBM, NVIDIA and Mellanox launch Design Center for Big Data and High Performance Computing ...

Launch event of SuperMUC Phase 2 on June 29, 2015 ...

Bright welcomes PC Link Egypt to its Partner Network ...

Middleware

OpenMP Device Constructs ...

Bright Computing to release Version 7.1 of Bright Cluster Manager at the ISC High Performance 2015 Conference ...

Agenda announced for PBS Works User Group Meeting ...

Hardware

CoolIT Systems reaches 50th patent milestone ...

DDN outlines strategic vision driving rapid adoption of DDN high performance storage technology throughout the enterprise ...

Nallatech 510T FPGA accelerator disrupts the data centre ...

Japan Atomic Energy Agency chooses SGI ICE X for new supercomputer system ...

ADVA Optical Networking unveils all-new Data Center Interconnect solution ...

ADVA Optical Networking launches new NFV demarcation product family ...

T-Systems and ADVA Optical Networking showcase the future of Terabit networking in unique demonstration ...

DDN object storage usage grows to 200+ billion objects; now world's 2nd largest object platform behind Amazon ...

Applications

Blue Waters simulations suggest there are fewer faint galaxies than expected ...

Researcher discovers groundwater modelling breakthrough ...

Internet of Things Turning New York's Lake George Into “World’s Smartest Lake ...

Producing spin-entangled electrons ...

The quantum middle man ...

New method of quantum entanglement packs vastly more data in a photon ...

The Cloud

Computational scientist Peter Coveney keynotes at ISC Cloud & Big Data ...

The quantum middle man

2 Jul 2015 Okinawa - Researchers at the Okinawa Institute of Science and Technology Graduate University (OIST) have identified a system that could store quantum information for longer times, which is critical for the future of quantum computing. This study was recently published inPhysical Review Letters. Quantum computing - which aims to use particles on the atomic scale to make calculations and store the results - has the potential to solve some key problems much faster than current computers.

To make quantum computing a reality, scientists must find a system that remains stable long enough to make the calculations. While this is an extremely short time frame, only thousandths of a second, the particles involved are so small that they are easily influenced by their surroundings. If the motion of the particles is disturbed, even a little, it throws off the whole calculation.

Nuclei are promising contenders for quantum memory because they are not easily influenced by their surroundings. However, that also makes them extremely difficult to manipulate. Many quantum physicists have tried with little success.

"In usual materials it is very difficult to control nuclei directly", stated Prof. Denis Konstantinov, who runs the Quantum Dynamics Unit at OIST.

Instead of trying control the nucleus directly, the researchers focused on a "middle man" of sorts - the electrons orbiting the nucleus.

The nucleus has a tiny internal magnet, called a "magnetic moment", and the electrons orbiting around it also have magnetic moments that are about 1,000 times larger. Those magnets interact with each other, which is called the "hyperfine interaction".

The hyperfine interaction is stronger in some materials than others. The researchers found that a crystal made of manganese and some other elements has a strong hyperfine interaction. This enabled them to manipulate the nuclei by first targeting the electrons.

Information in quantum computing is conveyed by photons, which are individual particles of light, which also make up other non-visible electromagnetic waves, such as ultraviolet and microwaves. The information transmitted is actually the quantum state of the photon. The quantum state of the photon needs to be transferred to another particle so it will last long enough for the computation to take place.

In this experiment, the researchers beamed microwaves through a manganese carbonate crystal. The magnetic field of the microwaves interacted with the magnetic moments of the electrons that are orbiting around the nuclei of the manganese atoms. The electrons' movements started to change, which in turn altered the movement of the nuclei because they are connected by the hyperfine interaction. The quantum state of the microwave photon was transferred to the nuclei when the nuclei's internal magnets flipped to point in the opposite direction.

This all has to happen very quickly before the quantum state of the photon changes. To transmit the information and flip the nuclei fast enough, there has to be a strong connection between the microwaves and nuclei via the electrons.

"To our knowledge, our experiment is the first demonstration of the strong coupling between microwave photons and nuclear spins", stated Leonid Abdurakhimov, a post-doctoral scholar at OIST and first author of the paper.

Next, the team plans to cool down the system to nearly -273 C, or -500 F, to see if they can strengthen the connection and extend the time information can be stored by minimizing temperature fluctuations.

"We are making the first and important steps towards using an ensemble of nuclear spins for quantum memory", Denis Konstantinov stated. "We now have a whole class of materials that can be used for this purpose. Future experiments promise to be quite exciting."
Source: Okinawa Institute of Science and Technology (OIST) Graduate University

Back to Table of contents

Primeur weekly 2015-07-06

Special

Moving up to an Open Science Commons ...

HPC in the Baltic region ...

Data Access helps its customers get the most out of their HPC investments ...

The importance of being earnest about the long tail of research ...

Comstor to simply the IP management of clusters ...

Arbor Networks to protect organisations against DDoS attacks ...

Open Science perspective highlighted at e-IRG workshop in Riga ...

Focus on Europe

IBM, NVIDIA and Mellanox launch Design Center for Big Data and High Performance Computing ...

Launch event of SuperMUC Phase 2 on June 29, 2015 ...

Bright welcomes PC Link Egypt to its Partner Network ...

Middleware

OpenMP Device Constructs ...

Bright Computing to release Version 7.1 of Bright Cluster Manager at the ISC High Performance 2015 Conference ...

Agenda announced for PBS Works User Group Meeting ...

Hardware

CoolIT Systems reaches 50th patent milestone ...

DDN outlines strategic vision driving rapid adoption of DDN high performance storage technology throughout the enterprise ...

Nallatech 510T FPGA accelerator disrupts the data centre ...

Japan Atomic Energy Agency chooses SGI ICE X for new supercomputer system ...

ADVA Optical Networking unveils all-new Data Center Interconnect solution ...

ADVA Optical Networking launches new NFV demarcation product family ...

T-Systems and ADVA Optical Networking showcase the future of Terabit networking in unique demonstration ...

DDN object storage usage grows to 200+ billion objects; now world's 2nd largest object platform behind Amazon ...

Applications

Blue Waters simulations suggest there are fewer faint galaxies than expected ...

Researcher discovers groundwater modelling breakthrough ...

Internet of Things Turning New York's Lake George Into “World’s Smartest Lake ...

Producing spin-entangled electrons ...

The quantum middle man ...

New method of quantum entanglement packs vastly more data in a photon ...

The Cloud

Computational scientist Peter Coveney keynotes at ISC Cloud & Big Data ...