For the first time, the researchers successes in measuring the magnetic interactions between ultracold particles confined in an optical lattice but separated by a long distance.
All previous work was limited to the interaction of particles which were close to each other. In Innsbruck they worked with strongly magnetic atoms which could also interact over long distances.
At first, the physicists produced a Bose-Einstein condensate from erbium atoms in a three dimensional lattice of laser beams which function like a synthetic crystal. In this stimulated solid-body crystal, the particles were arranged similar to eggs in a carton. The distance between the particles was seven times their wave function in the Innsbruck experiment.