强相互作用的85Rb玻色-爱因斯坦凝聚体的布拉格光谱学。
Bragg spectroscopy of a strongly interacting 85Rb Bose-Einstein condensate.
作者信息
Papp S B, Pino J M, Wild R J, Ronen S, Wieman C E, Jin D S, Cornell E A
机构信息
JILA, Quantum Physics Division, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA.
出版信息
Phys Rev Lett. 2008 Sep 26;101(13):135301. doi: 10.1103/PhysRevLett.101.135301. Epub 2008 Sep 22.
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.
我们报告了关于强相互作用玻色-爱因斯坦凝聚体激发光谱的测量结果。利用磁场费什巴赫共振来调节凝聚体中的原子-原子相互作用，并达到量子耗尽以及对凝聚体化学势的超出平均场修正显著的状态。我们使用双光子布拉格光谱来探测凝聚体激发光谱；我们的结果证明了气态玻色-爱因斯坦凝聚体中超出平均场效应的出现。
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