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Figure 1: The principle of the attoclock technique. A powerful infrared laser pulse is directed through a quarter-wave plate to produce an almost circularly polarised light. The laser pulse is channelled through a supersonic gas cloud of helium or argon, ionising the atoms and thereby permitting the tunnelling. The circularly polarised light can be used as a kind of clock face, with the final direction and speed of the electron and the direction of the circularly polarised light at the time of ionisation functioning like the hands on a clock.
Figure 2: The red dots represent collected data of the electron’s angle of deflection (θ) in connection with tunnelling in argon as a function of the laser strength. The greater the strength, the smaller the angle of deflection. The curves show the predictions of the angle of deflection according to different theories. The red line that appears to best match the data material is TIPIS (tunnel ionisation in parabolic coordinates with induced dipole and Stark shift) – the new theory developed by the Aarhus physicists. The name indicates that the theory was formulated using parabolic coordinates, taking shifts in both energy and multi-electron effects into account.
Associate Professor Lars Bojer Madsen, Department of Physics and Astronomy, Aarhus University.

2011.12.05 | Research, Science and Technology, Forside au.dk

Researchers use laser to ‘photograph’ the forbidden passage of electrons

In quantum mechanics, particles can travel through areas that are forbidden according to classical physics, a phenomenon called tunnelling. Researchers at Aarhus University and ETH Zurich in Switzerland have now mapped precisely where the particle emerges after its passage.

2011.11.30 | Research, Science and Technology, Forside au.dk

New approach to early diagnosis of oral cancer

Along with researchers from Australia and Norway, a research team at Aarhus University has found a new, simple and non-invasive method to diagnose oral cancer at an early stage, one of the most important parameters for successful treatment of the cancer.

2011.11.23 | Awards, Education, Research, Forside au.dk, School of Business and Social Sciences

Business and Social Sciences gains international recognition

The international magazine, European CEO, has recently elected Aarhus University, Business and Social Sciences as the most innovative business school in Northern Europe.

2011.11.23 | Awards, Research, Science and Technology, Forside au.dk

Researchers from Science and Technology nominated for Danish Research Results of the Year 2011

Videnskab.dk has selected three research results from Aarhus University – all from Science and Technology – among the ten nominations for the Danish Research Results of the Year 2011. The winner is determined by readers of the website, and you can help select the winner by voting at videnskab.dk no later than Sunday 27 November.

2011.11.14 | Research, Science and Technology, Talent development, Students, Forside au.dk, Awards

iNANO students win biodesign competition at Harvard University

Five Bachelor’s degree students from the Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, won the BIOMOD Grand Prize in the international BIOMOD Design Competition at Harvard University with their design of a new type of nanomedicine.

2011.11.08 | Research, Health, Forside au.dk

PFC substances increase risk of breast cancer

A new research project involving Greenland women with breast cancer shows for the first time a clear link between the risk of breast cancer and exposure to perfluorocarbons found in products such as raincoats, pizza trays and baking paper. More substances ought to be prohibited according to the Aarhus University researcher behind the study

2011.11.08 | Research, Health, Forside au.dk

Cancer cells sent on space journey

Aarhus professor currently testing thyroid cancer cells in weightless conditions in Chinese spacecraft.

2011.11.16 | Research, School of Business and Social Sciences, Forside au.dk

Researchers solve economic puzzle

Two researchers from Aarhus University, Business and Social Sciences have solved a puzzle for international economics research. Why do some figures show that export increases productivity when others suggest the opposite?

2011.11.10 | Research, Science and Technology, Forside au.dk

Challenge: feeding nine billion people

Danish knowledge, experience and efficiency in agricultural production will be extremely valuable at a time when the growing number of people on our planet need to be fed in a healthy and sustainable manner.

2011.11.01 | Research, Talent development, Science and Technology, Forside au.dk

iNANO strengthens ties to China

During a recent roundtrip in China, Professor and Director Flemming Besenbacher from the Interdisciplinary Nanoscience Center, iNANO, was appointed Overseas Director and Honorary Professor at Tongji and Jiangsu University, respectively.

2011.10.27 | Research, Science and Technology, Forside au.dk

Knowledge about low energy greenhouse production to be spread in the North Sea region

The countries surrounding the North Sea are collaborating on reducing energy consumption in greenhouses in a new project led by scientists from Aarhus University.

2011.11.03 | Research, School of Business and Social Sciences, Forside au.dk

Depression: Mindfulness can revolutionise treatment

Mindfulness-based cognitive therapy prevents relapses in recurrent depressions. New results from Aarhus University, Business and Social Sciences place the effects of this psychological treatment on an equal footing with medicinal relapse prophylaxis.

2011.10.19 | Research, Health, Forside au.dk

Growing up in the country helps to prevent asthma

Children who grow up on a pig or dairy cattle farm have a natural vaccination against the form of work-related asthma from which farmers frequently suffer. This has now been proved for the first time ever by researchers from Aarhus University.

2011.10.17 | Research, Science and Technology, Forside au.dk lille

New research provides a better understanding of the regulation of our genes

In collaboration with an Australian research group, a research team at Aarhus University has characterised a hitherto unknown and revolutionary way by which cells can regulate the formation of proteins.

2011.10.19 | Research, Science and Technology, Forside au.dk lille

Einstein’s “spooky action” improves precision measurements

Researchers at the Cluster of Excellence QUEST (Centre of Quantum Engineering and Space-Time Research) at Leibniz Universität Hannover, Germany, in collaboration with scientists from Spain, Italy and Denmark, report in the journal Science that they have overcome the shot noise limit.

2011.10.14 | Reseach policy, School of Business and Social Sciences, Forside au.dk

Business and Social Sciences climbs up Financial Times ranking list

For the second year in a row, Financial Times has placed the MSc programme in Finance & International Business on the list of the world’s best master’s programmes in management. The programme is offered by Aarhus University, Business and Social Sciences.

Galaxies and galaxy clusters in the universe. Source: ESA
The Euclid satellite with the universe in the background. Source: ESA
Ole Eggers Bjælde, postdoctoral scholar in astrophysics, Aarhus University
Steen Hannestad, professor of astrophysics, Aarhus University

2011.10.13 | Research, Forside au.dk, Knowledge exchange, Science and Technology

Nobel Prize in Physics has links to Aarhus University

The Nobel Prize in Physics 2011 was awarded for the discovery of the accelerating expansion of the universe – knowledge that astronomers at Aarhus University are among the best in the world at interpreting.

2011.10.07 | Research, Science and Technology, Forside au.dk

Ancient climate change has left a strong imprint on modern ecosystems

As Earth’s climate cycles between warm and cool periods, species must often move to stay within suitable conditions. A new study published in the prestigious journal Science and led by researchers at Aarhus University mapped how fast species have had to migrate in the past to keep up with the changing climate.

2011.10.11 | Research, Science and Technology

New knowledge about cellular stress response

In a joint effort, a researcher from Aarhus University and an American researcher have uncovered how a specific network of “messenger molecules” are inhibited simultaneously in the cell during cellular stress.

2011.10.12 | Awards, Research, Science and Technology, Forside au.dk lille

International prize for biodiversity research awarded to Aarhus University scientist

Professor Jens-Christian Svenning, Aarhus University, has been awarded the Ebbe Nielsen Prize for his research into how biodiversity is affected by climate change. He received the prize at a ceremony in Argentina.

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