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Primeur weekly 2019-08-05

Quantum computing

Imaging of exotic quantum particles as building blocks for quantum computing ...

Travelling towards a quantum internet at light speed ...

New toolkit for photonics: Quantum simulation by light radio ...

Is your supercomputer stumped? There may be a quantum solution ...

Quantum computers to clarify the connection between the quantum and classical worlds ...

Focus on Europe

Hungary, Portugal and Poland sign up to EU quantum communication infrastructure initiative ...

Middleware

Whiskytree chooses Panasas to address high-performance storage conditions for expanding visual effects facility ...

EXTEN Technologies announces version 3.0 of its HyperDynamic NVMe over Fabrics storage software with enhanced high-performance resiliency features ...

Raid Media Systems signs up as a Bright Reseller to target German supercomputing market ...

Hardware

Tachyum CEO presents "Flash Solutions for the Skyrocketing AI/ML Applications Market" at Flash Memory Summit ...

Granular aluminum for future computers ...

Optalysys appoints world renowned Silicon Photonics expert, Professor Thomas F. Krauss, to their Scientific Advisory Board ...

University of Vermont completes warp-speed upgrade of its supercomputer ...

Kalray announces the tape-out of Coolidge on TSMC 16nm process technology ...

Kalray unveils support of NVMe/TCP to ease and accelerate data centre storage disaggregation ...

Submer immersion cooling announces new North American headquarters in "Data Center Alley" ...

OLCF and tech company Providentia Worldwide build intelligence system for supercomputer cooling plant ...

William Kramer chosen to lead Pittsburgh Supercomputing Center ...

Simulating hurricanes with Blue Waters ...

Applications

Bubbles hold clue to improved industrial structures ...

NCSA collaborates with NGA to create the world's most powerful geospatial system ...

Oregon State University College of Engineering accelerates research, teaching with $2,6 million investment in AI computing resources ...

Supercomputing improves biomass fuel conversion ...

Scientists use Titan for complex cosmology studies ...

ALCC programme awards 6 million hours on OLCF resources ...

Researchers benchmarked a range of advanced combustion strategies on the Titan supercomputer ...

The fragile balance of the most productive ecosystems ...

The Cloud

SDSC awarded NSF grant for Triton Shared Computing Cluster upgrade ...

IBM transforms its software to be Cloud-native and run on any Cloud with Red Hat ...

Google Cloud and VMware extend strategic partnership ...

Travelling towards a quantum internet at light speed


Schematic image of the spin detection of a circularly polarized photon exciting an electron spin. The yellow nano-fabricated metal electrodes form the pockets required to trap the electrons, move them, and sense them.
29 Jul 2019 Osaka - A research team led by Osaka University demonstrated how information encoded in the circular polarization of a laser beam can be translated into the spin state of an electron in a quantum dot, each being a quantum bit and a quantum computer candidate. The achievement represents a major step towards a "quantum internet", in which future computers can rapidly and securely send and receive quantum information.

Quantum computers have the potential to vastly outperform current systems because they work in a fundamentally different way. Instead of processing discrete ones and zeros, quantum information, whether stored in electron spins or transmitted by laser photons, can be in a superposition of multiple states simultaneously. Moreover, the states of two or more objects can become entangled, so that the status of one cannot be completely described without this other. Handling entangled states allow quantum computers to evaluate many possibilities simultaneously, as well as transmit information from place to place immune from eavesdropping.

However, these entangled states can be very fragile, lasting only microseconds before losing coherence. To realize the goal of a quantum internet, over which coherent light signals can relay quantum information, these signals must be able to interact with electron spins inside distant computers.

Researchers led by Osaka University used laser light to send quantum information to a quantum dot by altering the spin state of a single electron trapped there. While electrons don't spin in the usual sense, they do have angular momentum, which can be flipped when absorbing circularly polarized laser light.

"Importantly, this action allowed us to read the state of the electron after applying the laser light to confirm that it was in the correct spin state", stated first author Takafumi Fujita. "Our readout method used the Pauli exclusion principle, which prohibits two electrons from occupying the exact same state. On the tiny quantum dot, there is only enough space for the electron to pass the so-called Pauli spin blockade if it has the correct spin."

Quantum information transfer has already been used for cryptographic purposes. "The transfer of superposition states or entangled states allows for completely secure quantum key distribution", senior author Akira Oiwa stated. "This is because any attempt to intercept the signal automatically destroys the superposition, making it impossible to listen in without being detected."

The rapid optical manipulation of individual spins is a promising method for producing a quantum nano-scale general computing platform. An exciting possibility is that future computers may be able to leverage this method for many other applications, including optimization and chemical simulations.

The work is published inNature Communicationsas "Angular momentum transfer from photon polarization to an electron spin in a gate-dened quantum dot" - DOI:10.1038/s41467-019-10939-x. The authors are Takafumi Fujita, Kazuhiro Morimoto, Haruki Kiyama, Giles Allison, Marcus Larsson, Arne Ludwig, Sascha R. Valentin, Andreas D. Wieck, Akira Oiwa, and Seigo Tarucha. The work is funded by the Japan Agency for Science and Technology, Japan Society for the Promotion of Science.
Source: Osaka University

Back to Table of contents

Primeur weekly 2019-08-05

Quantum computing

Imaging of exotic quantum particles as building blocks for quantum computing ...

Travelling towards a quantum internet at light speed ...

New toolkit for photonics: Quantum simulation by light radio ...

Is your supercomputer stumped? There may be a quantum solution ...

Quantum computers to clarify the connection between the quantum and classical worlds ...

Focus on Europe

Hungary, Portugal and Poland sign up to EU quantum communication infrastructure initiative ...

Middleware

Whiskytree chooses Panasas to address high-performance storage conditions for expanding visual effects facility ...

EXTEN Technologies announces version 3.0 of its HyperDynamic NVMe over Fabrics storage software with enhanced high-performance resiliency features ...

Raid Media Systems signs up as a Bright Reseller to target German supercomputing market ...

Hardware

Tachyum CEO presents "Flash Solutions for the Skyrocketing AI/ML Applications Market" at Flash Memory Summit ...

Granular aluminum for future computers ...

Optalysys appoints world renowned Silicon Photonics expert, Professor Thomas F. Krauss, to their Scientific Advisory Board ...

University of Vermont completes warp-speed upgrade of its supercomputer ...

Kalray announces the tape-out of Coolidge on TSMC 16nm process technology ...

Kalray unveils support of NVMe/TCP to ease and accelerate data centre storage disaggregation ...

Submer immersion cooling announces new North American headquarters in "Data Center Alley" ...

OLCF and tech company Providentia Worldwide build intelligence system for supercomputer cooling plant ...

William Kramer chosen to lead Pittsburgh Supercomputing Center ...

Simulating hurricanes with Blue Waters ...

Applications

Bubbles hold clue to improved industrial structures ...

NCSA collaborates with NGA to create the world's most powerful geospatial system ...

Oregon State University College of Engineering accelerates research, teaching with $2,6 million investment in AI computing resources ...

Supercomputing improves biomass fuel conversion ...

Scientists use Titan for complex cosmology studies ...

ALCC programme awards 6 million hours on OLCF resources ...

Researchers benchmarked a range of advanced combustion strategies on the Titan supercomputer ...

The fragile balance of the most productive ecosystems ...

The Cloud

SDSC awarded NSF grant for Triton Shared Computing Cluster upgrade ...

IBM transforms its software to be Cloud-native and run on any Cloud with Red Hat ...

Google Cloud and VMware extend strategic partnership ...