Microscopic computational model of a superfluid.
A finite one-dimensional microscopic model of a superfluid is presented. The model consists of interacting Bose particles with an additional impurity particle confined to a ring. Both semiclassical and exact quantum calculations reveal dissipationless motion of impurity with increased effective mass due to its interaction with the excitations of Bose fluid. It is shown that both the excitation spectrum of Bose fluid and the excitation spectrum of impurity can be analyzed using the structure of the ground state of the system.
Ovchinnikov
M
M
Department of Chemistry, University of Rochester, RC Box 270216, Rochester, New York 14627-0216, USA. ovchinnikov@chem.rochester.edu
Novikov
Alexey
A
D003198:Computer Simulation; D006371:Helium / Q000737:chemistry*; D008956:Models, Chemical; D010316:Particle Size; D011789:Quantum Theory
D006371:Helium