超流体的微观计算模型
Microscopic Computational Model of a Superfluid
摘要：
本文提出了一个有限的一维超流体微观模型。该模型由相互作用的玻色粒子与一个额外的杂质粒子被限制在一个环。半经典和精确量子计算都揭示了杂质与玻色流体激发态的相互作用导致有效质量增加的无耗散运动。结果表明，利用系统的基态结构可以分析玻色流体的激发谱和杂质的激发谱。
英文摘要：
A finite one-dimensional microscopic model of a superfulid 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.
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