论文标题
陷阱对称性和原子 - 原子相互作用对带有内部状态标记的被困原子干涉仪的影响
Effect of trap symmetry and atom-atom interactions on a trapped atom interferometer with internal state labelling
论文作者
论文摘要
在本文中，我们研究了在相互作用存在下具有内部状态标记的被困原子干涉仪的动力学。我们考虑两种情况：一个原子时钟，内部状态保持超级状态，以及将它们分开的惯性传感器构型。从平均自旋演变开始，我们推断出条纹对比度和相移。在时钟配置中，我们恢复了众所周知的相同自旋旋转效果（ISRE），该效应可以显着增加自旋相干时间。我们还发现，效应的大小取决于陷阱几何形状，与我们最近的实验结果一致的方式[M. Dupont-Nivet和Al。，New J. Phys。，20，043051（2018）]，其中未观察到Isre。在惯性传感器的情况下，我们表明，尽管存在空间分离，但仍然有可能通过使用平均场相互作用来抵消陷阱电位的不对称时间来增加相干时间。
In this paper, we study the dynamics of a trapped atom interferometer with internal state labelling in the presence of interactions. We consider two situations: an atomic clock in which the internal states remain superposed, and an inertial sensor configuration in which they are separated. From the average spin evolution, we deduce the fringe contrast and the phase-shift. In the clock configuration, we recover the well-known identical spin rotation effect (ISRE) which can significantly increase the spin coherence time. We also find that the magnitude of the effect depends on the trap geometry in a way that is consistent with our recent experimental results in a clock configuration [M. Dupont-Nivet, and al., New J. Phys., 20, 043051 (2018)], where ISRE was not observed. In the case of an inertial sensor, we show that despite the spatial separation it is still possible to increase the coherence time by using mean field interactions to counteract asymmetries of the trapping potential.
