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

• Published in: Condensed Matter Physics
• Date: 2017
• Main Authors: Panochko, G., Pastukhov, V., Vakarchuk, I.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2017
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/156974
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Behavior of the impurity atom in a weakly-interacting Bose gas / G. Panochko, V. Pastukhov, I. Vakarchuk // Condensed Matter Physics. — 2017. — Т. 20, № 1. — С. 13604: 1–11 . — Бібліогр.: 19 назв. — англ.

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-ene...