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News

2018.08.31 | Department of Physics, Staff, Public / media

New professor: Thomas Tauris

As of 1 September, Thomas Tauris has received employment in a fixed-term position as Professor in Astrophysics

Landau’s picture of a quantum many-body system in terms of interacting composite particles.

2018.08.30 | Department of Physics, Public / media, Staff, Students

Landau’s Effective Interaction in a Bose-Einstein Condensate

New paper in Phys. Rev. X by A. Camacho-Guardian and G. M. Bruun from IFA

A one dimensional cigar causes polaron behaviour to be totally different

2018.08.27 | Department of Physics, Students, Public / media, Staff

Bi-polarons in cigar condensates

New paper in PRL: Two polarons squeezed inside a cigar shaped condensate behave totally different than expected.

The green balls illustrate two polarons, which bind forming a bipolaron
by exchanging sound modes (blue cloud) in the surrounding BEC

2018.07.12 | Staff, Department of Physics, Public / media, Students

Bi-polarons in atomic Bose-Einstein condensates

New paper in PRL: Bi-polarons are bound states of two quasiparticles that exchange sound modes.

Not at large as Houston - but it's ours!

2018.07.05 | Department of Physics, Public / media, Staff, Students

Satellite control room inaugurated on 28 Junie2018

The first AU satellite Delphini-1 is expected to be launched in November 2018. Now the control room at IFA is ready.

[Translate to English:] Citizen Science common office

2018.07.03 | Staff, Department of Physics, Students, Public / media

Semper Ardens grant for Jacob Sherson's citizen science group

Jacob Sherson has received a Semper Ardens grant of DKK 15 million from the Carlsberg Foundation for a project seeking to combine human intuition and computing power. This will provide new opportunities to shape the future of artificial intelligence.

2018.06.13 | Department of Physics, Staff, Public / media

Catalysts for reduction of sulphur emissions under pressure

Strict regulations for Sulphur emissions call for improved catalytic processes of reducing Sulphur content in crude oil. Scientists from iNANO and Department of Physics and Astronomy at Aarhus University have revealed, how molybdenum disulpfide-based catalysts are able to remove Sulphur.

2018.06.12 | Department of Physics, Public / media

Workshop Training Course

Workshop training and technical drawing course is planned for week 33 and 34, 2018. Deadline for signing up is Tuesday 26 June 2018.

2018.06.11 | Department of Physics, Staff, Public / media

New Department Head

Ulrik Uggerhøj will be our new Department Head from 1st July 2018. Congratulations Ulrik. Please mark your calendar Wednesday 27 June 2-4 pm, where we will celebrate IFA – and say good bye and thank you to Lars for great commitment as Department Head since 2011 – and welcome to Ulrik as Department Head!

Poul Erik Nissen recieves diploma and medal.

2018.06.07 | Department of Physics, Public / media, PhD Students, Students, Staff

Poul Erik Nissen to receive the IFA medal for distinguished service

At a short ceremony ending the informations meeting on Monday 4 June 2018 associate professor emeritus Poul Erik Nissen was awarded IFA's medal for distinguished service from department manager Lars Andersen.

2018.06.04 | Department of Physics, Staff, Public / media

Professor Jørgen Christensen-Dalsgaard receives the Rigmor and Carl Holst-Knudsen Award for Scientific Research 2018

Professor Christensen-Dalsgaard is one of the most prominent contemporary stellar researchers. Since taking his PhD degree at Cambridge University in 1978, with a dissertation entitled Solar Oscillations, Professor Christensen-Dalsgaard has had a central and crucial role in establishing asteroseismology as an international area of research.

2018.06.04 | Department of Physics, Staff, Public / media

Amin Salami Dehkharghani has been awarded a PhD talent prize with a cash award of DKK 50,000.

Amin Salami Dehkharghani (quantum mechanics) has helped to lay a foundation for our understanding of one-dimensional quantum systems. This can have a major significance on the technology of the future.

2018.06.01 | Department of Physics, Staff, Public / media

RejsUd – the new travel expense management system replacing AURUS

A single (blue) atom in a Bose-Einstein condensate causes the gas atoms (red) to be distributed differently, creating a polaron (light blue area) that can be described as a quasi particle.

2018.05.18 | Staff, Public / media, Students, Department of Physics

Quantum simulations of quasi particles

Georg Bruun and Jan Arlt at IFA have received a grant of Dkr kr. 5 842 049 from Danmarks Frie Forskningsfond for further work into this exiting and very promising research area.

Mads Fredslund Andersen hired as SONG telescope project manager.

2018.05.02 | Department of Physics, Staff, Public / media, Students

Mads Fredslund Andersen employed as new manager of the SONG project

Stellar Astrophysics Centre has hired Mads Fredslund Andersen as SONG manager for the next 4 years, starting 1 April 2018.

FIG.1: Some special semiconductor materials can host exotic excitons with a vastly extended Rydberg-state wave function.

2018.04.19 | Department of Physics, Staff, Public / media

Giant excitons manipulate quantum light

A recent publication in Nature Communications by Valentin Walther and Thomas Pohl explores giant excitons in a semiconductor.

2018.04.11 | Department of Physics, Public / media

Jacob Sherson appointed til professor mso

Effective from 1 March 2018 Jacob Sherson is employed as Professor with special assignments (MSO).

The Triple-alpha-proces. Astrophysicists, please read from left to right. Physicists from right to left, thank you!

2018.04.09 | Department of Physics, Staff, Public / media, Students

Toy model for the Hoyle decay of 12C

The Hoyle decay of 12C is the opposite effect of the important triple-alpha process in the hotter stars. Researchers at IFA are studying one in other to better understand the other.

ALPHA experiment (Foto: Maximilien Brice/CERN)

2018.04.04 | Department of Physics, Staff, Public / media, Students

Most precise determinations of fine structure in anti-hydrogen reported in this week's Nature

The most precise spectroscopic measurement of antimatter so far is reported in a paper published in Nature this week. The findings confirm the capabilities of anti-atom spectroscopy and bring the development of ultra-sensitive tests of antimatter one step closer.

Basic setting with Rydberg spin wave excitations in an ultracold
gas.

2018.03.23 | Department of Physics, Public / media, Staff, Students

Single photons can be plucked out from a laser beam

Recent paper in Physical Review Letters has participants from a.o. IFA

2018.03.19 | Department of Physics, Staff, Public / media, PhD Students, Students

Registration for course in Topological Insulators

Registration: Please e-mail Georg Bruun bruungmb@phys.au.dk before 1 April. See further under Events.

Electrons experiencing a strong electromagnetic field are shaken up. Illustration: Imperial College London/Stuart Mangles

2018.02.20 | Department of Physics, Public / media, Staff, Students

Electrons in strong laser light get 'shaken up'

Danish publication Ingeniøren writes on 13 February 2018: Influenced by a very strong electromagnetic field electrons will experience a 'radiation reaction'; difficult to describe theoretically. Tobias Wistisen, Helge Knudsen and Ulrik Uggerhøj of IFA are co-authors in a recent paper in Nature Communications.

The single-particle energy distributions for the neutron at ρ=5, 30, 70, and 80 fm for S=1.17

2018.02.08 | Department of Physics, Staff, Public / media, Students

Better insight in three-particle nuclear clusters

Recent paper in Physical Review letters describes a theoretical model for many-body quantum mechanical clusters. The model may be significant in explaining where such systems can be found amongst atomic nuclei.

2018.01.26 | Department of Physics, Staff, Public / media, Students

New phenomenon observed in materials physics

Søren Ulstrup et al find new particle - meet the Trion

2018.01.18 | Department of Physics, Public / media, Staff, Students

Sun-like star may become a Rosetta Stone in the understanding of our own Sun

New study of a star almost like the Sun brings us closer to an understanding of the physical processes behind the cycle of the Sun, and may help us understand how the Sun affects our climate.

2017.11.29 | Department of Physics, Staff, Public / media

Liv Hornekær appointed professor

As of 1 December 2017 Liv Hornekær will be employed as professor in experimental material science.

2017.11.20 | Department of Physics, Students, Staff, Public / media

Sapere Aude grant for IFA astronomer: Galactic archaeology

Assistant professor Victor Silva Aguirre has been awarded the prestigious Sapere Aude grant of Dkr. 5,9 million for pursuing Galactic Archeology in the project " Asteroseismology for Galactic archaeology: rediscovering the Milky Way"

Group photo from the launch of the LEAPS initiative in Brussels 13 November 2017. Several faces known at IFA can be seen.

2017.11.20 | Department of Physics, Staff, Public / media, Students

ASTRID, ASTRID2 and their "colleagues" LEAPS forward in new collaborative EU-initiative

Time is running out for the EU support for development of accelerator based light sources, but a new collaboration has been launched.

Gas planets have their shell of gases blown away when they approach a star too closely. A different species of rocky planet is left. This artists impression is of the exoplanet 55 Cancri e, slightly larger than the Earth. Credit: ESA and Martion Kornmesser.

2017.11.20 | Department of Physics, Students, Public / media, Staff

Not as many earthlike exoplanets after all?

Probably not all of the many rocky planets should be counted along, when we estimate the number of possible earthlike planets, diminishing the chances of life out there.

Kamilla visiting ASTRID. Outfit: Bianca Steffensen, photo: Jonathan Søe

2017.11.02 | Department of Physics, Staff, Public / media, Students

Visitors to ASTRID

ASTRID and her daughter ASTRID II received unusual visitors on Wednesday 25 October 2017 2017

2017.10.31 | Department of Physics, Staff, Public / media, Students, PhD Students, CQOM coll

Opening of the Center for Quantum Optics and Quantum Matter (CQOM)

The newly established Center for Quantum Optics and Quantum Matter (CQOM) will hold its official launch event on November 8 at the Aarhus Institute of Advanced Studies.

Artist's impression of the formation of a kilonova from two merging neutron stars. Credit: ESO

2017.10.21 | Department of Physics, Public / media, Staff, Students

Rain of Gold from Galaxy NGC 4993 confirms prediction by theoretical researchers

The great news story of week 42 gave a lot of quotes in the media all over the World. Gravitational waves observed by LIGO-Virgo were almost immediately followed up by observations with astronomical instruments almost in the full electromagnetic range on 17 August 2017 from the galaxy NGC 4993. The source, named a kilonova was caused by a merger…

The configuration space for 4 particles having equal masses

2017.10.21 | Department of Physics, Staff, Public / media, Students

Transformation of coordinates gives quantum solutions for unequal masses

A new mathematical model of interacting quantum particles exhibits a broader range of dynamical behavior than previous models, which could provide experimentalists with better insight into mixed-mass ensembles of particles. In Physical Review X for 10 October 2017 a team of researchers with Nathan Harshman (main author), Amin Dehkharghani and…

2017.10.16 | Department of Physics, Public / media, Staff

New postdoc - Karsten Handrup

Karsten Handrup joined the groups of Henrik B. Pedersen as a postdoctoral researcher on 1 October 2017.

Principle of ASTRID

2017.10.12 | Department of Physics, Public / media, Students, Staff

Spectrum of solid CO shows extreme temperature sensitivity

IFA's David Field and Andrew Cassidy are co-authors of a new paper in Physical Review Letters describing some surprising aspects of extremely cold solid carbon monoxide - CO

[Translate to English:] Supernova SN 2016jhr blusser kraftigt op fra 4. til 5. april 2016

2017.10.08 | Department of Physics, Public / media, Staff, Students

Unusual type Ia supernova reported in Nature this week

IFA's Max Strizinger is coauthor of a paper titeled "A hybrid type Ia supernova with an early flash triggered by helium-shell detonation", published in Nature 5 October 2017

One polariton is stopped by another, and the 'bulit in' photon is emitted in a random or a controlled direction

2017.10.05 | Department of Physics, Staff, Public / media, Students

Manipulation of single photons in Physical Review paper

Callum Murray and Thomas Pohl of IFA og The Max Planck institute in Dresden have a paper out on 13 June 2017 on the possiblities of manipulating single photons i a cold gas

2017.10.05 | Department of Physics, Staff, Public / media

New postdoc - Sudip Sasmal

Sudip Sasmal joined the group of Oriol Vendrell as a postdoctoral researcher on 1 October 2017

2017.09.26 | Department of Physics, Staff, Public / media

Experiencing problems with your access card?

If you have more than one access card, you must use the most recent one to access AU’s buildings from 4 October. If your access card does not work, you have to order a new one.

2017.09.25 | Department of Physics, Staff, Public / media

Niels Bohr Professor Thomas Pohl new AIAS Associate

Next week, AIAS welcomes Professor Thomas Pohl from the Department of Physics and Astronomy, Aarhus University as new AIAS Associate for the next two years.

Radiocarbon studies of Danish oak confirms the 994 C.E. cosmic ray event

2017.09.25 | Department of Physics, Staff, Public / media, Students

Cosmic ray event in 994 C.E. recorded in radiocarbon from Danish oak

2017.09.22 | Department of Physics, Staff, Public / media

New postdoc: Itsik Cohen

Itsik Cohen joined the group of Klaus Mølmer as a postdoctoral researcher on 15 September 2017.

Two laser pulses excite a crystal of sapphire causing it to emit coherent light

2017.09.18 | Department of Physics, Staff, Public / media, Students

LADIE - a new coherent light effect

Nature Physics reports on a new optical effect discovered in collaboration btw. University of Kassel and IFA.

MASCARA being installed at the La Silla Observatory. credit: ESO

2017.09.11 | Department of Physics, Public / media, Staff, Students

Two new exoplanets confirmed by the Danish SONG telescope

The Dutch camera system MASCARA and the Danish 1-meter SONG telescope on Tenerife have supported each other in the discovery of two 'hot Jupiters'.

2017.09.06 | Department of Physics, Staff, Public / media

New postdoc: Nikola Sibalic

Nikola Sibalic joined the group of Thomas Pohl as postdoctoral researcher on 1st September 2017.

2017.09.05 | Department of Physics, Staff, Public / media

New postdoc: Elisabeth Gruber

We welcome Elisabeth Gruber who joined the group of Lars Andersen on 1st September 2017 as a postdoctoral researcher

[Translate to English:] Plejaderne - Syvstjernen kendes i himmelmyterne over hele Verden under forskellige navne

2017.09.01 | Department of Physics, Staff, Students, Public / media

Kepler satellite discovers variability in the Pleiades

Tim White from IFA, et al tell of a new photometric method in recent paper in Monthly Notices of the Royal Astronomical Observatory.

2017.08.28 | Department of Physics, Public / media, Staff

Academic ‘candy’ for school teachers

School teachers are demanding further education, and their request has been acknowledged by researchers at Aarhus University and the University of Copenhagen, who organised the course ‘from Big Bang to the Modern Human’. There were 170 participants in the course held in Aarhus in August.

2017.08.24 | Department of Physics, Staff, Public / media

New postdoc: Muhammad Hanif

We welcome Muhammad Hanif who joined the group of Marcel Mudrich on 1 September 2017 as a postdoctoral researcher.

Ordinary table salt literally forms the basis of a new and very promising technique for transferring thin solar film

2017.08.23 | Department of Physics, Staff, Public / media, Students

Researchers at Aarhus University develop highly efficient transferable solar cells using table salt

Technique combines photon-harvesting strategy with detachability in silicon thin film solar cells

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