Hau, Lene2010-02-122007Hau, Lene Vestergaard. 2007. Nonlinear optics: Shocking superfluids. Nature Physics 3(1): 13-14.1745-2473http://nrs.harvard.edu/urn-3:HUL.InstRepos:3636965How shock waves travel through a superfluid provides clues to understanding the deeper nature of Bose–Einstein condensation. An optical analogue that behaves as a pure superfluid could tell us what these clues mean.en-USCommentary or Review10.1038/nphys498