From JQI press release: "By shining laser light and applying an external magnetic field with a gradient on a gas of neutral atoms in an ultracold state of matter known as a Bose-Einstein condensate, Spielman and his colleagues have synthesized an environment in which the neutral atoms act as if they were charged particles swirling in a uniform magnetic field. See the JQI multimedia report Synthetic Magnetism Achieved by Optical Methods in Ultracold Atoms and the Nature paper http://www.nature.com/nature/journal/v462/n7273/abs/nature08609.html."