Spontaneous four-wave mixing of de Broglie waves: beyond optics.
نویسندگان
چکیده
We investigate the atom-optical analog of degenerate four-wave mixing by colliding two Bose-Einstein condensates of metastable helium. The momentum distribution of the scattered atoms is measured in three dimensions. A simple analogy with photon phase matching conditions suggests a spherical final distribution. We find, however, that it is an ellipsoid with radii smaller than the initial collision momenta. Numerical and analytical calculations agree with this and reveal the interplay between many-body effects, mean-field interaction, and the anisotropy of the source condensate.
منابع مشابه
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عنوان ژورنال:
- Physical review letters
دوره 104 15 شماره
صفحات -
تاریخ انتشار 2010