Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > EU-funded scientists achieve new state in quantum physics

Abstract:
EU-funded researchers in Austria investigating ultracold atomic physics have generated an exotic state wherein atoms are aligned in a one-dimensional structure, creating a stable 'many-body phase' with new quantum mechanical states. Their findings, published in the journal Science, open up a new area of study in quantum physics.

EU-funded scientists achieve new state in quantum physics

EU | Posted on September 9th, 2009

The results were an outcome of the NAME-QUAM ('Nanodesigning of atomic and molecular quantum matter') project, funded with EUR 2 million through the 'Information and communication technologies' Theme of the Seventh Framework Programme (FP7). NAME-QUAM partners study ultracold atom and molecule quantum-matter technology with the goal of identifying new directions and alternative approaches towards scalable and miniaturisable quantum information processing.

In the specialised area of 'many-body quantum physics,' scientists have observed a dramatic amplification of the effects of quantum fluctuations when the interactions between particles are strong and the geometry of the system is simple. Well-known examples include zero-dimensional quantum dots and one-dimensional quantum wires. However, achieving such an excited-state phase that is also long-lived is experimentally difficult because the systems quickly decay, partly as a result of 'coupling' with the environment.

In this latest research, the team, led by Hanns-Christoph Naegerl of the University of Innsbruck in Austria, recognised the potential of using ultracold atoms to generate a long-lived, strongly interacting, excited, many-body phase. Cold atoms can easily decouple from the environment, they reasoned, and their interactions are 'tunable'.

'Ultracold quantum gases offer a big advantage: they can be isolated against the environment quite well,' said Dr Naegerl.

Bosons are particles that can occupy the same quantum state; in other words, bosons with the same energy can occupy the same place in space. Bosons that have been observed experimentally include photons, which are force carriers of the electromagnetic field, and gluons, which are force carriers underlying the strong nuclear force.

The researchers produced a quantum gas made up of bosonic caesium atoms in a vacuum chamber. Then, they generated an optical lattice using two laser beams; the lattice confined the atoms to vertical, one-dimensional structures with up to 15 atoms aligned in each 'tube'. The laser beams prevented the atoms from shifting out of line or changing places. Once this was achieved, the scientists used a magnetic field to tune the interaction among the atoms.

'By increasing the interaction energy between the atoms (attraction interaction), the atoms start coming together and the structure quickly decays,' explained Dr Naegerl. This is called the 'Bosenova effect'. When the interaction energy is minimised, the atoms are able to repel instead of attract each other; this allows them to align vertically and regularly along a one-dimensional structure. The resulting system is stable.

The researchers observed a surprising effect when the interactions were switched from strongly repulsive to strongly attractive. They achieved 'an exotic, gas-like phase, where the atoms are excited and correlated but do not come together and the 'Bosenova effect' is absent', said Dr Naegerl.

According to co-investigator Elmar Haller of the University of Innsbruck, the phase was predicted four years ago. 'We have now been able to realise it experimentally for the first time,' he stated.

The experimental setup will be used in future studies to investigate the properties of quantum wires, which have until now been extremely difficult to observe. Further research on low-dimensional structures may also shed light on the functioning of high-temperature superconductors.

The study received support from the European Science Foundation's EuroQUASAR ('Funding initiative for multidisciplinary research in the field of quantum standards and metrology') programme through the collective research project 'Quantum-degenerate gases for precision measurements'. One of the researchers was also supported by an FP7 Marie Curie international incoming fellowship.

For more information, please visit:

University of Innsbruck: www.uibk.ac.at/

Science: www.sciencemag.org/

####

About CORDIS
CORDIS, the Community Research and Development Information Service for Science, Research and Development, is the official source of information on the seventh framework programme (FP7) calls for proposals; it offers interactive web facilities that links together researchers, policymakers, managers and key players in the field of research.

For more information, please click here

Contacts:
European Commission
Directorate-General for Research
Directorate G - Industrial Technologies
Office CDMA 6/112
Attn: Jesús Alquézar
B-1049 Brussels
Tel. +32 2 295 1167
Fax +32 2 296 7023

Copyright © CORDIS

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

NanoSummit in Luxembourg: single wall carbon nanotubes have entered our lives as we approach a nanoaugmented future November 23rd, 2017

JPK reports on the exciting research in the School of Medicine at Sungkyunkwan University (SKKU), Suwon, South Korea using the NanoWizard® ULTRA Speed AFM to understand the binding of transcription factor Sox2 with super enhancers November 23rd, 2017

Precision NanoSystems to host nanomedicines roundtable November 23rd, 2017

Fine felted nanotubes : Research team of Kiel University develops new composite material made of carbon nanotubes November 22nd, 2017

Physics

Inorganic-organic halide perovskites for new photovoltaic technology November 6th, 2017

Halas wins American Physical Society's Lilienfeld Prize: Rice University nanoscientist honored for pioneering research in plasmonics October 23rd, 2017

A step closer to understanding quantum mechanics: Swansea University’s physicists develop a new quantum simulation protocol October 22nd, 2017

'Find the Lady' in the quantum world: International team of researchers presents method for quantum-mechanical swapping of positions October 18th, 2017

Govt.-Legislation/Regulation/Funding/Policy

EC Project Aims at Creating and Commercializing Cyber-Physical-System Solutions November 14th, 2017

Nanobiotix presented new clinical and pre-clinical data confirming NBTXR3’s significant potential role in Immuno-Oncology at SITC Annual Meeting November 14th, 2017

Leti Joins DARPA-Funded Project to Develop Implantable Device for Restoring Vision November 9th, 2017

Nanoshells could deliver more chemo with fewer side effects: In vitro study verifies method for remotely triggering release of cancer drugs November 8th, 2017

Possible Futures

Fine felted nanotubes : Research team of Kiel University develops new composite material made of carbon nanotubes November 22nd, 2017

Report highlights opportunities and risks associated with synthetic biology and bioengineering November 22nd, 2017

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Quantum Computing

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Spin current detection in quantum materials unlocks potential for alternative electronics October 15th, 2017

Quantum manipulation power for quantum information processing gets a boost: Improving the efficiency of quantum heat engines involves reducing the number of photons in a cavity, ultimately impacting quantum manipulation power October 14th, 2017

Quantum communications bend to our needs: By changing the wavelengths of entangled photons to those used in telecommunications, researchers see quantum technology take a major leap forward September 28th, 2017

Announcements

NanoSummit in Luxembourg: single wall carbon nanotubes have entered our lives as we approach a nanoaugmented future November 23rd, 2017

JPK reports on the exciting research in the School of Medicine at Sungkyunkwan University (SKKU), Suwon, South Korea using the NanoWizard® ULTRA Speed AFM to understand the binding of transcription factor Sox2 with super enhancers November 23rd, 2017

Precision NanoSystems to host nanomedicines roundtable November 23rd, 2017

Fine felted nanotubes : Research team of Kiel University develops new composite material made of carbon nanotubes November 22nd, 2017

Quantum nanoscience

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

'Find the Lady' in the quantum world: International team of researchers presents method for quantum-mechanical swapping of positions October 18th, 2017

What can be discovered at the junction of physics and chemistry October 6th, 2017

Energy against the current on a quantum scale, without contradicting the laws of physics: A piece of research in which the UPV/EHU-University of the Basque Country has participated confirms that merely observing a flow of energy or particles can change its direction October 6th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project