Back to Table of contents

Primeur weekly 2019-06-03

Quantum computing

Quantum information gets a boost from thin-film breakthrough ...

Focus on Europe

Wrap up of an inspiring EuroHPC Summit Week 2019 including PRACEdays19 ...

Hardware

Excelero and ThinkParQ go to market with integrated NVMesh and BeeGFS ...

Tachyum successfully deploys Linux OS on universal processor chip ...

Supermicro displays Resource-Saving server technology and new 5G Edge solutions at Computex 2019 ...

NVIDIA launches Edge computing platform to bring real-time AI to global industries ...

TYAN showcases HPC, storage and Cloud server platforms featuring 2nd Gen Intel Xeon scalable processors at Computex 2019 ...

Applications

DesignSafe and ADCIRC provide storm surge simulators for natural hazards community ...

University of Wyoming faculty have until June 21 to apply for supercomputer use ...

The Spanish supercomputer that helps design aerodynamics for thousands of UK cars ...

DJI Manifold 2 onboard supercomputer transforms drones into autonomous robots ...

Study finds Red Sea may be cooling rather than warming ...

Garching physicists develop a new method to carry computations in quantum field theory ...

NCSA's Blue Waters Petascale Computing Hackathon now accepting applications ...

Combination of experiments and calculations allows examination of boron's complicated dance ...

New Argonne computational model to accelerate engine development for next-generation hypersonic flight ...

The Cloud

Vulnerability of cloud service hardware uncovered ...

Univa's Navops Launch solution simplifies Cloud usage to help customers migrate their HPC workloads to the Cloud ...

Quantum information gets a boost from thin-film breakthrough


An innovative method for controlling single-photon emission for specific locations in 2D materials may offer a new path toward all-optical quantum computers and other quantum technologies. This image shows a false-color scanning electron micrograph of the array used to create place single-photon sources in epitaxial tungsten diselenide. Inset shows the Hanbury-Brown Twiss interferometry measurement proving quantum emission. Credit: Image by Michael Pettes Los Alamos National Laboratory image.
29 May 2019 Los Alamos - Efforts to create reliable light-based quantum computing, quantum key distribution for cybersecurity, and other technologies got a boost from a new study demonstrating an innovative method for creating thin films to control the emission of single photons.

"Efficiently controlling certain thin-film materials so they emit single photons at precise locations - what's known as deterministic quantum emission - paves the way for beyond-lab-scale quantum materials", stated Michael Pettes, a Los Alamos National Laboratory materials scientist and leader of the multi-institution research team.

The scalability of these two-dimensional, tungsten/selenium thin films makes them potentially useful in processes to manufacture quantum technologies. Single-photon generation is a requirement for all-optical quantum computing and key distribution in quantum communications, and it is crucial for advancing quantum information technologies.

The project, documented as a Featured Article in the journal Applied Physics Letters , exploits strain at highly spatially localized and well-separated emission sites, or tips, in a tungsten/selenium film. The team synthesized the film through chemical vapor deposition using a multi-step, diffusion-mediated gas source.

Because the material is very thin, it conforms to the radius of the tips and the material bends towards the substrate by more than a few percent, like someone lying on a bed of nails. The resulting strain is enough to change the electronic structure, but only at the tips. The affected area emits light of a different color and nature than light from the rest of the film.

"While more research is needed to fully understand the role of mechanical deformation in creating these quantum emission sites, we may enable a route to control quantum optical properties by using strain", Michael Pettes stated. "These single-photon sources form the basis for photonics-based, all-optical quantum computing schemes."

Engineering of quantum emission in 2D materials is still in a very early stage, the authors note. While studies have observed single photons originating from defect structures in these materials, previous work has suggested that non-uniform strain fields might govern the effect. However, the mechanism responsible for this emergent phenomenon remains unclear and is the focus of ongoing work at Los Alamos.

The work at Los Alamos National Laboratory was funded by the Laboratory Directed Research and Development Programme (LDRD 20190516ECR) and the Center for Integrated Nanotechonogies (CINT), a DOE nanoscience research centre jointly operated by Los Alamos and Sandia national laboratories. Upgrades to the tandem accelerator were funded by the Principal Associate Directorate for Science, Technology, and Engineering capital investment fund and the CINT capability development fund.
Source: DOE/Los Alamos National Laboratory

Back to Table of contents

Primeur weekly 2019-06-03

Quantum computing

Quantum information gets a boost from thin-film breakthrough ...

Focus on Europe

Wrap up of an inspiring EuroHPC Summit Week 2019 including PRACEdays19 ...

Hardware

Excelero and ThinkParQ go to market with integrated NVMesh and BeeGFS ...

Tachyum successfully deploys Linux OS on universal processor chip ...

Supermicro displays Resource-Saving server technology and new 5G Edge solutions at Computex 2019 ...

NVIDIA launches Edge computing platform to bring real-time AI to global industries ...

TYAN showcases HPC, storage and Cloud server platforms featuring 2nd Gen Intel Xeon scalable processors at Computex 2019 ...

Applications

DesignSafe and ADCIRC provide storm surge simulators for natural hazards community ...

University of Wyoming faculty have until June 21 to apply for supercomputer use ...

The Spanish supercomputer that helps design aerodynamics for thousands of UK cars ...

DJI Manifold 2 onboard supercomputer transforms drones into autonomous robots ...

Study finds Red Sea may be cooling rather than warming ...

Garching physicists develop a new method to carry computations in quantum field theory ...

NCSA's Blue Waters Petascale Computing Hackathon now accepting applications ...

Combination of experiments and calculations allows examination of boron's complicated dance ...

New Argonne computational model to accelerate engine development for next-generation hypersonic flight ...

The Cloud

Vulnerability of cloud service hardware uncovered ...

Univa's Navops Launch solution simplifies Cloud usage to help customers migrate their HPC workloads to the Cloud ...