Bose-Einstein condensation of ultracold atoms out of equilibrium. University of Antwerp
Superfluids form a phase of matter, distinct from the gaseous, fluid and solid states, whose most remarkable characteristic is a vanishing viscosity. This absence of friction is a consequence of the fact that all particles move together, in analogy to the photons that come out of a laser. Lasers and superfluids share the coherence of the particles (atoms and photons respectively), but an important difference between them is that the former ...