Green’s function method to the ground state properties of a two-component Bose–Einstein condensate

• Published in: Физика низких температур
• Date: 2011
• Main Authors: Liang, C., Wei, K., Ye, B.J., Wen, H.M., Zhou, X.Y., Han, R.D.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2011
• Subjects: Бозе-эйнштейновская конденсация
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/118618
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Green’s function method to the ground state properties of a two-component Bose–Einstein condensate / C. Liang, K. Wei, B.J. Ye, H.M. Wen, X.Y. Zhou, R.D. Han // Физика низких температур. — 2011. — Т. 37, № 7. — С. 708–714. — Бібліогр.: 20 назв. — англ.

The elementary excitation spectrum of a two-component Bose–Einstein condensate is obtained by Green’s function method. It is found to have two branches. In the long-wave limit, the two branches of the excitation spectrum are reduced to one phonon excitation and one single-particle excitation. With t...