基于相移的光晶格深度的超鲁棒标定
Ultrarobust calibration of an optical lattice depth based on a phase shift
摘要:
本文报道了一种标定光晶格深度的新方法。它是由一个突然的相移触发云的场内偶极模式。相应的振荡运动是直接相关的带内频率在一个大范围的晶格深度。值得注意的是,对于中等位移,在足够长的飞行时间后观察到的零阶和一阶干涉图案的振荡由单一频率主导。该方法对原子-原子相互作用和初始囚禁势的外部约束的精确值是鲁棒的。
英文摘要:
We report on a new method to calibrate the depth of an optical lattice. It consists in triggering the intrasite dipole mode of the cloud by a sudden phase shift. The corresponding oscillatory motion is directly related to the intraband frequencies on a large range of lattice depths. Remarkably, for a moderate displacement, a single frequency dominates this oscillation for the zeroth and first order interference pattern observed after a sufficiently long time-of-flight. The method is robust against atom-atom interactions and the exact value of the extra external confinement of the initial trapping potential.
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