Momentum spectroscopy of 1D phase fluctuations in Bose-Einstein condensates.
نویسندگان
چکیده
We measure the axial momentum distribution of Bose-Einstein condensates with an aspect ratio of 152 using Bragg spectroscopy. We observe the Lorentzian momentum distribution characteristic of one-dimensional phase fluctuations. The temperature dependence of the width of this distribution provides a quantitative test of quasicondensate theory. In addition, we observe a condensate length consistent with the suppression of density fluctuations, even when phase fluctuations are large.
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ورودعنوان ژورنال:
- Physical review letters
دوره 91 1 شماره
صفحات -
تاریخ انتشار 2003