论文标题
孔间相互作用对物质波干涉仪的非线性束分式分离器的影响
Effect of Inter-Well Interactions on Non-Linear Beam Splitters for Matter-Wave Interferometers
论文作者
论文摘要
我们在存在双孔相互作用的情况下，使用超低量子气体在物质波干涉仪中研究了非线性束分离器，从而诱导了孔间密度密度耦合，例如可以实现与偶极气体的实现。我们在以相干，双胞胎或中午状态的形式考虑不同的输入状态后探索了这种效果。我们首先回顾了仅存在局部相互作用的非相互作用限制，包括在自捕捞阈值附近的灵敏度研究。然后，我们考虑在存在间相互作用的情况下的两种模型，并将灵敏度的缩放缩放为非本地耦合强度的函数。我们的分析清楚地表明，非本地相互作用可以补偿局部相互作用引起的灵敏度的降解，从而可以用来恢复最佳灵敏度。
We study the non-linear beam splitter in matter-wave interferometers using ultracold quantum gases in a double-well configuration in presence of non-local interactions inducing inter-well density-density coupling, as they can be realized, e.g., with dipolar gases. We explore this effect after considering different input states, in the form of either coherent, or Twin-Fock, or NOON states. We first review the non-interacting limit and the case in which only the local interaction is present, including the study of sensitivity near the self-trapping threshold. Then, we consider the two-mode model in the presence of inter-well interactions and consider the scaling of the sensitivity as a function of the non-local coupling strength. Our analysis clearly shows that non-local interactions can compensate the degradation of the sensitivity induced by local interactions, so that they may be used to restore optimal sensitivity.
