Simulations have shown that molecular hydrogen (H2) should become a superfluid under the proper conditions. The red dots represent the starting point for H2 molecules sitting on a silver substrate at a temperature of 0.5 K. The red paths are the trajectories of the molecules as they move about within a triangular lattice of potassium atoms. By the end of the simulation timeframe, all the H2 molecules will have shifted around by a space equivalent to one molecule, an indication that the molecules constitute a superfluid. The dashed black line is the unit simulation cell.
This research is described in the 13 October 1997 issue of Physical Review Letters. For more information, contact David Ceperley of the University of Illinois at email@example.com.
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