Behavior of the impurity atom in a weakly-interacting Bose gas

被引：8

作者：

Panochko, G. ^{[1
]}

Pastukhov, V. ^{[2
]}

Vakarchuk, I. ^{[2
]}

机构：

[1] Ivan Franko Natl Univ Lviv, Coll Nat Sci, 107 Tarnavsky St, UA-79010 Lvov, Ukraine

[2] Ivan Franko Natl Univ Lviv, Dept Theoret Phys, 12 Dragomanov St, UA-79005 Lvov, Ukraine

来源：

CONDENSED MATTER PHYSICS | 2017年 / 20卷 / 01期

关键词：

Bose polaron; the damping spectrum; the self-energy;

D O I：

10.5488/CMP.20.13604

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We studied the properties of a single impurity atom immersed in a dilute Bose condensate at low temperatures. In particular, we perturbatively obtained the momentum dependence of the impurity spectrum and damping. By means of the Brillouin-Wigner perturbation theory we also calculated the self-energy both for attractive and repulsive polaron in the long-wavelength limit. The stability problem of the impurity atom in a weakly-interacting Bose gas is also examined.

引用

页数：11

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