Abstract Maglia - 769fce4af8aa0d 18 Maglie Calcio Lunga 2017 com Arsenal Away 2018 Sarayeamoozesh
We give new information on the excitations in superfluid 4He. By a variational computation we obtain a very accurate description of the excitations; the energy spectrum has deviation from experiment at the level of 5%. The first microscopic study of roton wave packets is presented. R+ and York Jersey Jets New BasketballR− rotons cannot be described as single particle excitations due to interference effects between neighboring atoms. The roton minimum corresponds to the special wave vector where this interference disappears and the local density and momentum essentially coincide with those of a single particle excitation.
- Received 13 September 1996
©1996 American Physical Society