Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Switching Qubits with a Terahertz Source?

02.03.2011
Rotational transitions induced in molecules on a chip could have important applications in quantum computing

Scientists in Germany and the USA have been able to induce rotational transitions in molecules trapped at a close distance above a chip using a terahertz source. The new results, which are published in ChemPhysChem, could have interesting applications in quantum computing.

Polar molecules in selected quantum states can be guided, decelerated and trapped using electric fields created by microstructured electrodes on a chip. One of the possible applications of such molecules on a chip is their use in future quantum computers. However, to achieve this, researchers must be able to drive transitions from a certain quantum state to another one, that is, they should to be able "to switch a qubit (or quantum bit)". A transition between two rotational levels in a molecule is very well suited for this, and that is the reason why Gabriele Santambrogio and co-workers at the Fritz Haber Institute of the Max Planck Society in Berlin and Liam Duffy of the University of North Carolina at Greensboro decided to use a rather uncommon narrowband terahertz (THz) source to induce rotational transitions in laser-prepared metastable CO molecules. The researchers coupled the source to a chip setup that had been previously developed by them and studied the transitions between two quantum states in polar molecules trapped on the chip.

According to co-author Gerard Meijer, both the experimental approach and the results of this work are unique. The combination of laser-prepared molecules in a single rotational level, tunable narrow-band mm-wave radiation that can transfer the population to another rotational level, and state-selective detection of the molecules at a known delay and position, offers many interesting possibilities. With this approach, the research team has not only been able to trap the polar molecules on a chip but has also played further games with them—like inducing the rotational transitions. Meijer believes that these results could find important applications in quantum computing: "In the future, it is conceivable that compact THz sources are integrated on a chip, and that one can use this to switch between qubits in a routine fashion", he says.

Author: Gabriele Santambrogio, Gerard Meijer, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin (Germany), http://www.fhi-berlin.mpg.de/

Title: Driving Rotational Transitions in Molecules on a Chip

ChemPhysChem 2011, 12, No. 10, Permalink to the article: http://dx.doi.org/10.1002/cphc.201001007

Gabriele Santambrogio | Wiley-VCH
Further information:
http://www.fhi-berlin.mpg.de/
http://www.wiley.com

More articles from Life Sciences:

nachricht Researchers uncover protein-based “cancer signature”
05.12.2016 | Universität Basel

nachricht The Nagoya Protocol Creates Disadvantages for Many Countries when Applied to Microorganisms
05.12.2016 | Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

IHP presents the fastest silicon-based transistor in the world

05.12.2016 | Power and Electrical Engineering

InLight study: insights into chemical processes using light

05.12.2016 | Materials Sciences

High-precision magnetic field sensing

05.12.2016 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>