New postdoc: Andreas Næsby

2016.08.15Andreas Naesby joined the group of Aurelien Dantan as a postdoctoral researcher on the 15th of August. He will work on developing new electro-opto-mechanical systems where vibrations of micromechanical drums interact both with optical light fields and electrical fields.

The cold gas is trapped in the oblong (blue) 'bucket' to the left by means of a magnetic field setup not shown in this drawing. Laser light is beamed through the gas, causing the polarization of the light to rotate. The light is transmittet through a filter enabling only the rotated part of the light to reach a CCD camera, recording a large number of images of the light. This is called Faraday imaging. Each picture is analyzed on-line in an integrated circuit, the FPGA (Field Programmable Gate Array). Via the RF unit, the FPGA orders the magnetic trap to open, letting a few atoms out of the trap, and a new series of images are recorded, verifying the stabilization. The photo diode PD ensures that the intensity of the laser is unchanged during the experiment, ensuring the best possible statistics on the number of atoms.

Countable cold clouds of atoms

2016.08.15Put some cold atoms in a closed magnetic 'bucket' - count how many you have, throw away the excess - and do it again and again with the same number of atoms. At IFA Jan Arlt's research group has developed a new and promising technique to assure that a known number of atoms can be reproduced time after time i cold atomic clouds. The results have been published in Physical Review Letters 12 August 2016. The paper has received the special honour of being an Editors' Suggestion in PRL, plus a background article in Physical Review Focus.

DIY quantum computers?!

2016.08.15To date, more than 150,000 players have solved puzzles in a virtual universe, ScienceAtHome, to help researchers take steps towards the creation of a quantum computer. Now an opportunity is given to everyone to move real atoms remotely via their own computer.

Greenland sharks live for hundreds of years

2016.08.12While the more than 5 meter long Greenland shark is one of the world's largest sharks, it is also one of the least understood animals on our planet. The Greenland shark's general biology and way of life have been a mystery to biologists for many years. However, marine biologists at the University of Copenhagen have now deployed an epoch-making method to unveil one of the greatest of the mysteries surrounding this enigmatic shark - and have come to an amazing revelation: with a life expectancy of at least 272 years, the Greenland shark has the longest life expectancy of all vertebrate animals known to science.

New Employee: Kåre Iversen

2016.08.08Kåre Iversen is employed at the Department of Physics and Astronomy (IFA) as of 1 September to work with the design of the neutron instrument HEIMDAL, in collaboration with the Institute of Chemistry (IFK).