Helium-4 and bosons

Created almost 5 years ago, updated 27 days ago

1956 Energy Spectrum of the Excitations in Liquid Helium Richard Feynman and Michael Cohen

The roton state represented by the function (21) can be described roughly classically as a vortex ring of such small. radius that only one atom can pass through the center. Outside the ring there is a slow drift of atoms returning for another passage through the ring. There are at least three ways that the classical picture is modified.