Levinson-like theorem for scattering from a Bose-Einstein condensate.
نویسندگان
چکیده
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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عنوان ژورنال:
- Physical review letters
دوره 91 7 شماره
صفحات -
تاریخ انتشار 2003