Back to Table of contents

Primeur weekly 2011-08-15

Desktop Grids

DistrRTgen added to BOINC project list ...

Infinispan 5.0 offers more than 45 new features ...

The Cloud

S&S Worldwide boosts sales by 75 percent with IBM Smarter Commerce software in the Cloud ...

Citrix extends desktop virtualization leadership with acquisition of RingCube ...

EuroFlash

Altair announces keynote presenters of 5th European HyperWorks Technology Conference ...

1st International IRISC Workshop to issue Call for Participation ...

Nottingham scientists pioneer new method for nanoribbon production ...

When atoms are surfing on optical waves ...

The diamond's quantum memory ...

USFlash

Addonics announces 5-Port HPM-XU port multiplier with eSATA/USB 3.0 connections and a family of RAID tower storage solutions ...

IBM terminates Blue Waters contract ...

Steve Scott to leave Cray ...

SDSC readying 'Gordon' supercomputer for pre-production trials this month ...

'Data Motion Metric' needed for supercomputer rankings, according to SDSC's Snavely ...

Platform Computing recognized for second consecutive year at International Business Awards ...

Supercomputer boosts research power, data support available at WKU facility ...

GNS Healthcare announces collaboration with Bristol-Myers Squibb ...

IBM raises bar, records highest ever TPC-C benchmark for x86 servers ...

Oracle Fusion Middleware 11g delivers record setting performance for 2-processor system on SPECjEnterprise2010 benchmark ...

Oracle Solaris 11 Express available on Oracle Exadata Database Machines ...

MOSAID files suit on computer networking patents ...

Emerson Network Power first to earn EAL2+ Common Criteria certification for secure KVM switch series ...

Fusion-io to acquire IO Turbine ...

Caltech-led engineers solve longstanding problem in photonic chip technology ...

NIST physicists 'entangle' 2 atoms using microwaves for the first time ...

Designing diamond circuits for extreme environments ...

Tufts computer engineer wins national award for research ...

Berkeley Lab researchers develop technique for dynamically controlling plasmonic airy beams ...

When atoms are surfing on optical waves

9 Aug 2011 Tuebingen - Researchers at the University of Tuebingen are working on next generation's computer: They made cold atoms interact with miniature gold wires as small as a thousandth of a millimeter. Illuminating the wires with laser light in a special way, the physicists concentrated the light field at the surface of the wires and, by that, generated so-called surface plasmons. These are bound light fields which might enable the construction of devices for optical computing and for quantum information. Circuits based on these devices would be much faster and more efficient than present technologies.

In order to build an optical computing device the surface plasmons, which are useful for data transfer, must be coupled to data storage elements, such as atoms. This is what the research team lead by Dr. Sebastian Slama is working on. The junior scientist developed techniques at the chair of Prof. Claus Zimmermann which are crucial for positioning cold atoms very close to surfaces such that they can interact with bound light waves. For that atomic gases are cooled in a vacuum chamber down to temperatures as low as a few hundred Nanokelvin.

At such low temperature the atoms no longer behave as a classical gas. They form a so-called Bose-Einstein condensate, in which all atoms are in the same quantum state. The condensate can be regarded as a single huge super-atom and can be shifted by external magnetic fields to the surface, where it feels the influence of the plasmon. "We can generate plasmons which attract the atoms and others which repel them. By structuring the surface we can tailor almost arbitrary potential landscapes for the atoms", stated Dr. Slama.

Recently, the scientists published their results inNature Photonicsmagazine. First author Christian Stehle, who is working on his PhD thesis and has measured the data - together with Helmar Bender, who is now postdoc at the University of Sao Carlos in Brazil - is enthusiastic: "Our results had a great impact. We managed to get on the title page of the August issue, and the magazine values our work in a comment." However, with this success the scientists' work is not terminated. "Our goal is to build hybrid devices for optical computing and quantum information. We were now able to set a milestone, but there is still a lot to do", stated Dr. Slama. In his opinion these goals can only be achieved in co-operation with other scientists. Beside already existing cooperations like the one with the nanotechnology group of Prof. Dieter Kern and Dr. Monika Fleischer, who fabricated the gold structures, Dr. Slama has made contact to further scientists in Tuebingen, Europe and in Brazil.

The authors of the paper are Christian Stehle, Helmar Bender, Claus Zimmermann, Dieter Kern, Monika Fleischer, and Sebastian Slama. "Plasmonically tailored micropotentials for ultracold atoms" appeared in

Nature Photonics5, 494-498 (2011), at http://www.nature.com/nphoton/journal/v5/n8/full/nphoton.2011.159.html
Source: University of Tuebingen

Back to Table of contents

Primeur weekly 2011-08-15

Desktop Grids

DistrRTgen added to BOINC project list ...

Infinispan 5.0 offers more than 45 new features ...

The Cloud

S&S Worldwide boosts sales by 75 percent with IBM Smarter Commerce software in the Cloud ...

Citrix extends desktop virtualization leadership with acquisition of RingCube ...

EuroFlash

Altair announces keynote presenters of 5th European HyperWorks Technology Conference ...

1st International IRISC Workshop to issue Call for Participation ...

Nottingham scientists pioneer new method for nanoribbon production ...

When atoms are surfing on optical waves ...

The diamond's quantum memory ...

USFlash

Addonics announces 5-Port HPM-XU port multiplier with eSATA/USB 3.0 connections and a family of RAID tower storage solutions ...

IBM terminates Blue Waters contract ...

Steve Scott to leave Cray ...

SDSC readying 'Gordon' supercomputer for pre-production trials this month ...

'Data Motion Metric' needed for supercomputer rankings, according to SDSC's Snavely ...

Platform Computing recognized for second consecutive year at International Business Awards ...

Supercomputer boosts research power, data support available at WKU facility ...

GNS Healthcare announces collaboration with Bristol-Myers Squibb ...

IBM raises bar, records highest ever TPC-C benchmark for x86 servers ...

Oracle Fusion Middleware 11g delivers record setting performance for 2-processor system on SPECjEnterprise2010 benchmark ...

Oracle Solaris 11 Express available on Oracle Exadata Database Machines ...

MOSAID files suit on computer networking patents ...

Emerson Network Power first to earn EAL2+ Common Criteria certification for secure KVM switch series ...

Fusion-io to acquire IO Turbine ...

Caltech-led engineers solve longstanding problem in photonic chip technology ...

NIST physicists 'entangle' 2 atoms using microwaves for the first time ...

Designing diamond circuits for extreme environments ...

Tufts computer engineer wins national award for research ...

Berkeley Lab researchers develop technique for dynamically controlling plasmonic airy beams ...