2009/11/11 by Mikhail Ovchinnikov, M. Ovchinnikov, Alexey Novikov · 3 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Excitation #Ground state #Impurity #Particle (ecology) #Physics #Quantum #Quantum mechanics #Quantum, superfluid, helium dynamics #Semiclassical physics #Spectrum (functional analysis) #Superfluidity #cond-mat.other
paper · pdf · doi:10.1063/1.3424846
published in The Journal of Chemical Physics 132(21), 214101 (American Institute of Physics)
arxiv created 2009/11/11 · openalex publication_date 2010/06/02 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.