We propose a scheme for trapped-atom interferometry using an interacting Bose-Einstein condensate. The condensate is controlled and spatially split into two confined external momentum modes through a series of Bragg pulses. The proposed scheme (i) allows the generation of large entanglement in a trapped-interferometer configuration via one-axis twisting dynamics induced by interatomic interaction and (ii) avoids the suppression of interactions during the interferometer sequence by a careful manipulation of the state before and after phase encoding. The interferometer can be used for the measurement of gravity with a sensitivity beyond the standard quantum limit.

中文翻译：

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带有被困玻色-爱因斯坦凝聚的非线性布拉格干涉仪

我们提出了一种使用相互作用的玻色-爱因斯坦凝聚物进行俘获原子干涉测量的方案。通过一系列布拉格脉冲，冷凝物被控制并在空间上分裂成两个受限的外部动量模式。所提出的方案 (i) 允许通过由原子间相互作用引起的单轴扭转动力学在捕获干涉仪配置中产生大纠缠，并且 (ii) 通过仔细操纵之前和之前的状态避免干涉仪序列期间的相互作用抑制相位编码后。干涉仪可用于重力测量，其灵敏度超出标准量子极限。