Levinson-like theorem for scattering from a Bose-Einstein condensate -: art. no. 070403

被引：6
|
作者：
Brand, J [1 ]
Häring, I [1 ]
Rost, JM [1 ]
机构：
[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 07期
关键词：
D O I：
10.1103/PhysRevLett.91.070403
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A relation between the number of bound elementary excitations of an atomic Bose-Einstein condensate and the phase shift of elastically scattered atoms is derived. Within the Bogoliubov model of a weakly interacting Bose gas this relation is exact and generalizes Levinson's theorem. Specific features of the Bogoliubov model such as complex energy and continuum bound states are discussed and a numerical example is given.
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页数：4
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