Physicists implement a version of Maxwell’s famous thought experiment for reducing entropy

Phys.org  September 8, 2018
Reduced entropy in a three-dimensional lattice of super-cooled, laser-trapped atoms could help speed progress toward creating quantum computers. Researchers at Pennsylvania State University rearranged a randomly distributed array of atoms into neatly organized blocks, thus performing the function of a “Maxwell’s demon”—a thought experiment from the 1870s that challenged the second law of thermodynamics. The organized blocks of atoms could form the basis for a quantum computer that uses uncharged atoms to encode data and perform calculations… read more. TECHNICAL ARTICLE 

Reducing entropy in a randomly half-filled 5x5x5 lattice of atoms. Credit: Weiss Laboratory, Penn State