The  25th of April, Troels Mørch defended his Master thesis "Spinor Dynamics and Faraday Imaging of Ultra-Cold Gasses". Troels has been working as a master student on the Lattice experiment for the last year. (04/13)

Wenzhou Zhang joined the group in March 2013. He will work on the new HiRes experiment as a postdoctoral researcher. Wenzhou previously worked at the Chinese Academy of Sciences on Bose-Fermi mixtures of ultracold atoms. (03/13)

On the 18th of February, the first MOT was realized in the new High Resolution Experiment. The system consists of a combined 2D and 3D MOT, and it will form the basis for creating BECs in the new experiment. (02/13)

Recently Mark obtained a Marie Curie Fellowship. Mark works as a postdoctoral researcher on setting up the new HiRes experiment. Congratulations to Mark! (12/12)

In August Ridha Horchani joined group as a postdoctoral researcher on the MIX experiment. Ridha previously worked at Laboratoire Aimé Cotton on cooling of cesium molecules. (08/2012)

Published in NJP!

We demonstrate the experimental realization of quasi-free wave packets of ultra-cold atoms bound by an external harmonic trap. The wave packets are produced by modulating the intensity of an optical lattice containing a Bose–Einstein condensate. The evolution of these wave packets is monitored in situ and their six-photon reflection at a band gap is observed. In direct analogy with pump–probe spectroscopy, a probe pulse allows for the resonant de-excitation of the wave packet into states localized around selected lattice sites at a long distance from the main component. New J. Phys. 14 083013 (2012) (08/2012) 

In July Andrew Hilliard and Mark Bason joined our group as postdoctoral researchers. In the coming years they will work on the existing lattice and the new HiRes experiments. We all look forward to the exciting experiments to come in these setus. (07/2012)

At the recent meeting of the Danish Physical Society (DFS) Lars won the poster price! Congratulations! He shares the prize with Ditte Både Sandkamm from the short pulse laser group. The official announcement with a nice picture can be found here. (06/2012)

In May our group was joined by Romain Müller, who will set up the new HiRes experiment. Romain previously worked on cooling of bosonic cesium and fermionic lithium at Heidelberg University. We all look forward to the exciting start of a new experiment. (05/2012)

Published in PRA!

We report on measurements of splitting Bose-Einstein condensates by using a time-dependent optical lattice potential. In this work we demonstrate the division of a BEC into a set of equally populated components and we apply time-dependent optical Bragg mirrors to a BEC oscillating in a harmonic trap. In addition a combination of multiple Bragg reflections and Landau-Zener tunneling allows for the generation of macroscopic arrays of condensates. arXiv:1203.6683 and Phys. Rev. A 85, 033626 (2012) (03/2012)

The first BEC in the MIX laboratory was realized on the 15.2.2012! The magnification of the imaging system is only set to 1 at the moment, and so far it is not focussed very well. Nonetheless the low expansion of the cloud provides clear evidence for BEC. It took us roughly 5 months to make a BEC after moving the apparatus from Hannover to Århus. The number of atoms and the temperature seems to be the same as in our previous work! Now we can start to optimise! (02/2012)

The MIX experiment just recieved its new fibre amplifier! This will allow us to capture large samples of rubidium and potassium in a hybrid trap. Total powers of up to 50W will allow up to five times deeper traps under similar experimental conditions. Now we can finally proceed to make BECs in the MIX experiment once again! (1/2012)

In December our group was joined by Lars Wacker, who previously did his Diploma Thesis at Hamburg University. He is currently getting started on the MIX experiment with lots of plans for 2012. (01/2012)