标题： 空间调制玻色气体中相干性的合作散射测量 显示英文标题

标题： Cooperative scattering measurement of coherence in a spatially modulated Bose gas

摘要： 通过超辐射散射测量从光学晶格中释放的玻色气体的相关性。选择条件使得在布拉格角入射光泵浦后，由于物质波放大和模式竞争，超辐射散射主要进入布拉格衍射模式。对超辐射散射增益的时间分析显示由于晶格位点之间初始缺乏相干性而出现周期性振荡和阻尼。这种阻尼用于以一个晶格周期的精度表征系统中的一阶空间相关性。 显示英文摘要

摘要： Correlations of a Bose gas released from an optical lattice are measured using superradiant scattering. Conditions are chosen so that after initial incident light pumping at the Bragg angle for diffraction, due to matter wave amplification and mode competition, superradiant scattering into the Bragg diffracted mode is preponderant. A temporal analysis of the superradiant scattering gain reveals periodical oscillations and damping due to the initial lack of coherence between lattice sites. Such damping is used for characterizing first order spatial correlations in our system with a precision of one lattice period.