Bragg spectroscopy of a strongly interacting 85Rb Bose-Einstein condensate
Bragg spectroscopy of a strongly interacting 85Rb Bose-Einstein condensate
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DOI：
10.1103/physrevlett.101.135301
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发表时间：
2008-09-26
影响因子：
8.6
通讯作者：
Cornell, E. A.
中科院分区：
文献类型：
--
作者：
Papp, S. B.;Pino, J. M.;Cornell, E. A.
我们报告的测量激发光谱的强相互作用玻色-爱因斯坦凝聚。一个磁场Feshbach共振是用来调整原子-原子之间的相互作用的冷凝物，并达到一个制度，量子耗尽和超越平均场修正冷凝物化学势是显着的。我们使用双光子布拉格光谱探测凝聚体的激发光谱，我们的结果表明，在气态玻色-爱因斯坦凝聚体的发病超出平均场效应。
We report on measurements of the excitation spectrum of a strongly interacting Bose-Einstein condensate. A magnetic-field Feshbach resonance is used to tune atom-atom interactions in the condensate and to reach a regime where quantum depletion and beyond mean-field corrections to the condensate chemical potential are significant. We use two-photon Bragg spectroscopy to probe the condensate excitation spectrum; our results demonstrate the onset of beyond mean-field effects in a gaseous Bose-Einstein condensate.