玻色-爱因斯坦凝聚体在一维光晶格中的相位涨落是研究量子相变的重要参量.在实验和理论上分别获得了凝聚体从光晶格中释放后的密度分布,通过分析比较两者干涉峰的对比度提取凝聚体在光晶格中的相位涨落.应用这一方法,测量了不同光晶格阱深下凝聚体的相位涨落.当光晶格阱深从最小值5.6ER变化到30.7ER时,相位涨落从0.29π上升到0.69π.
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