> "His team used three pairs of laser beams to trap and cool neutral (uncharged) cesium atoms to ultra-cold temperatures (a few degrees above absolute zero) in a 3D lattice with 125 positions (a 5×5×5 cube). They filled half the positions with atoms in random positions and then moved the atoms around by changing the polarization of the laser traps—the equivalent function of Maxwell's demon, except using position to sort them rather than speed. By this means, they were able to create ordered 5×5×2 or 4×4×3 subsets within the originally disordered lattice, thereby reducing the system's entropy."

Quoting directly from the article, note I only skimmed it.

The article seems pretty clear that they did actually perform the experiment, not just design it.