Georgios Vasilakis, Niels Bohr Institute (IMAGE) University of Copenhagen - Niels Bohr Institute Caption Georgios Vasilakis, a postdoc in Quantop is working on the experiments in the quantum optics laboratory. Here, the researchers have a tiny glass tube that contains a cloud of billions of caesium atoms and using laser light, the tilts of all of the atoms are turned in the same direction and you can calculate the ultra-small magnetic fields with great precision. Credit (Credit: Ola Jakup Joensen, NBI) Usage Restrictions (Credit: Ola Jakup Joensen, NBI) License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.