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Primeur weekly 2016-10-03

Exascale supercomputing

NCI continues to lead Australian HPC capabilities with adoption of cutting-edge Intel processors ...

Quantum computing

D-Wave Systems previews 2000-qubit quantum system ...

First quantum photonic circuit with an electrically driven light source ...

Focus on Europe

Earlham Institute embraces Green-HPC for Collaborative Genome Analysis at Icelandic Data Centre Verne Global ...

Fortissimo has launched 2nd Open Call for proposals ...

STFC Computers get to the heart of the matter ...

Rob van Nieuwpoort, professor by special appointment of Efficient Computing for eScience ...

VTT Centre for Nuclear Safety inaugurated ...

Middleware

Allinea launches CUDA 8 support to enable code development for newest NVIDIA GPU technology ...

China endeavours to build a Big Data 'Smart Ocean' ...

Percepto and Orange Silicon Valley showcase advanced autonomous drone platform with 4G/LTE connectivity ...

Hardware

TSMC recognizes Synopsys with three partner awards for Interface IP and joint development of 7-nm ...

NetSpeed releases Gemini 3.0 cache-coherent NoC IP to supercharge heterogeneous SoC designs ...

Quantum provides Petascale data storage and management for major European research institutions ...

The University of Tokyo and the Joint Center for Advanced High Performance Computing (JCAHPC) to deploy DDN's file cache system IME14K ...

Introducing Xavier, the NVIDIA AI supercomputer for the future of autonomous transporation ...

Penguin Computing to deliver scalable enterprise storage for HPC, Big Data and VM ...

Applications

Loyola Marymount University researchers predict climate change will bring more droughts, more floods and water shortage ...

UMass Amherst engineers lead research team on creating new devices that emulate human biological synapses ...

Computer engineers boost app speeds by more than 9 percent ...

North Carolina School of Science and Mathematics awarded access to high-performance supercomputer ...

Hartree Centre presents at International Industrial Supercomputing Workshop ...

Mapping the electric underground ...

IBM Foundation collaborates with AFT and education leaders to use Watson to help teachers ...

Crosstalk analysis of biological networks for improved pathway annotation ...

How to merge two black holes in a simple way ...

Nijmegen provides solution for secure processing of patient data ...

The Cloud

Penguin Computing announces availability of unique multi-user remote desktop collaboration for Scyld Cloud workstation ...

Microsoft unveils new offerings to empower IT and drive digital transformation ...

Eurofiber’s Secure Cloud Connect service provides safe access to the Cloud ...

New NetApp software and Flash systems simplify data management, boost performance in the hybrid Cloud ...

Penguin Computing announces OpenPOWER server platform and go-to-market partner Mark III systems ...

Clarient Global adopts IBM Cloud and VMware for enhanced private Cloud capabilities ...

First quantum photonic circuit with an electrically driven light source


Carbon tube (center) as a photon source and superconducting nanowires as receivers constitute part of the optical chip. Photo: W.Pernice/WWU.
27 Sep 2016 Karlsruhe - Whether for use in safe data encryption, ultrafast calculation of huge data volumes or so-called quantum simulation of highly complex systems: Optical quantum computers are a source of hope for tomorrow's computer technology. For the first time, scientists now have succeeded in placing a complete quantum optical structure on a chip, as outlined in theNature Photonicsjournal. This fulfills one condition for the use of photonic circuits in optical quantum computers.

"Experiments investigating the applicability of optical quantum technology so far have often claimed whole laboratory spaces", explained Professor Ralph Krupke of the KIT. "However, if this technology is to be employed meaningfully, it must be accommodated on a minimum of space." Participants in the study were scientists from Germany, Poland, and Russia under the leadership of Professors Wolfram Pernice of the Westphalian Wilhelm University of Münster (WWU) and Ralph Krupke, Manfred Kappes, and Carsten Rockstuhl of the Karlsruhe Institute of Technology (KIT).

The light source for the quantum photonic circuit used by the scientists for the first time were special nanotubes made of carbon. They have a diameter 100,000 times smaller than a human hair, and they emit single light particles when excited by laser light. Light particles (photons) are also referred to as light quanta. Hence the term "quantum photonics".

That carbon tubes emit single photons makes them attractive as ultracompact light sources for optical quantum computers. "However, it is not easily possible to accommodate the laser technology on a scalable chip", admitted physicist Wolfram Pernice. The scalability of a system, i.e. the possibility to miniaturize components so as to be able to increase their number, is a precondition for this technology to be used in powerful computers up to an optical quantum computer.

As all elements on the chip now developed are triggered electrically, no additional laser systems are required any more, which is a marked simplification over the optical excitation normally used. "The development of a scalable chip on which a single-photon source, detector, and waveguide are combined, is an important step for research", emphasized Ralph Krupke, who conducts research at the KIT Institute for Nanotechnology and the Institute of Materials Science of the Darmstadt Technical University. "As we were able to show that single photons can be emitted also by electric excitation of the carbon nanotubes, we have overcome a limiting factor so far preventing potential applicability."

The scientists studied whether the flow of electricity through carbon nanotubes caused single light quanta to be emitted. For this purpose, they used carbon nanotubes as single-photon sources, superconducting nanowires as detectors, and nanophotonic waveguides. One single-photon source and two detectors each were connected with one waveguide. The structure was cooled with liquid helium to allow single light quanta to be counted. The chips were produced in an electron beam scribing device.

The scientists' work is fundamental research. It is not yet clear whether and when it will lead to practical applications. Wolfram Pernice and the first author, Svetlana Khasminskaya, were supported by the Deutsche Forschungsgemeinschaft and the Helmholtz-Gemeinschaft, Ralph Krupke was funded by the Volkswagen Foundation.

Khasminskaya S. et al. are the authors of the paper titled "Fully integrated quantum photonic circuit with an electrically driven light source", published inNature Photonics; DOI10.1038/nphoton.2016.178.

Source: Karlsruhe Institute of Technology - KIT

Back to Table of contents

Primeur weekly 2016-10-03

Exascale supercomputing

NCI continues to lead Australian HPC capabilities with adoption of cutting-edge Intel processors ...

Quantum computing

D-Wave Systems previews 2000-qubit quantum system ...

First quantum photonic circuit with an electrically driven light source ...

Focus on Europe

Earlham Institute embraces Green-HPC for Collaborative Genome Analysis at Icelandic Data Centre Verne Global ...

Fortissimo has launched 2nd Open Call for proposals ...

STFC Computers get to the heart of the matter ...

Rob van Nieuwpoort, professor by special appointment of Efficient Computing for eScience ...

VTT Centre for Nuclear Safety inaugurated ...

Middleware

Allinea launches CUDA 8 support to enable code development for newest NVIDIA GPU technology ...

China endeavours to build a Big Data 'Smart Ocean' ...

Percepto and Orange Silicon Valley showcase advanced autonomous drone platform with 4G/LTE connectivity ...

Hardware

TSMC recognizes Synopsys with three partner awards for Interface IP and joint development of 7-nm ...

NetSpeed releases Gemini 3.0 cache-coherent NoC IP to supercharge heterogeneous SoC designs ...

Quantum provides Petascale data storage and management for major European research institutions ...

The University of Tokyo and the Joint Center for Advanced High Performance Computing (JCAHPC) to deploy DDN's file cache system IME14K ...

Introducing Xavier, the NVIDIA AI supercomputer for the future of autonomous transporation ...

Penguin Computing to deliver scalable enterprise storage for HPC, Big Data and VM ...

Applications

Loyola Marymount University researchers predict climate change will bring more droughts, more floods and water shortage ...

UMass Amherst engineers lead research team on creating new devices that emulate human biological synapses ...

Computer engineers boost app speeds by more than 9 percent ...

North Carolina School of Science and Mathematics awarded access to high-performance supercomputer ...

Hartree Centre presents at International Industrial Supercomputing Workshop ...

Mapping the electric underground ...

IBM Foundation collaborates with AFT and education leaders to use Watson to help teachers ...

Crosstalk analysis of biological networks for improved pathway annotation ...

How to merge two black holes in a simple way ...

Nijmegen provides solution for secure processing of patient data ...

The Cloud

Penguin Computing announces availability of unique multi-user remote desktop collaboration for Scyld Cloud workstation ...

Microsoft unveils new offerings to empower IT and drive digital transformation ...

Eurofiber’s Secure Cloud Connect service provides safe access to the Cloud ...

New NetApp software and Flash systems simplify data management, boost performance in the hybrid Cloud ...

Penguin Computing announces OpenPOWER server platform and go-to-market partner Mark III systems ...

Clarient Global adopts IBM Cloud and VMware for enhanced private Cloud capabilities ...