标题： 微波修饰的状态选择势用于原子干涉仪 显示英文标题

标题： Microwave-dressed state-selective potentials for atom interferometry

摘要： 我们提出了一种新颖且稳健的技术，用于实现被捕获的玻色-爱因斯坦凝聚体（BECs）的分束器。 该方案依赖于同时为两种内部原子态产生不同势能的可能性。 原子通过两种长寿命内部态之间的拉比耦合，从单势阱势场相干地转移到双势阱。 我们提供了支持我们提议的数值模拟，并确认了在具有$^{87}$Rb 的 BEC 中转移过程的优异效率和保真度。 我们讨论了实验实现，建议使用状态选择性微波势作为磁约束原子的理想工具。 这种技术的工作原理在我们的原子芯片装置上进行了测试，该装置集成了共面微波导线。 特别是，报告了首次通过微波修饰场实现双势阱势场。 实验结果与数值模拟一起呈现，显示出良好的一致性。 还展示了对两个铷钟态外部势场的同时独立控制。 两个态之间的转移，分别对应单势阱和双势阱，被表征并用于测量双势阱中原子的能量谱。 我们的结果表明，两个态之间的空间重叠对于确保分束器的正常运行至关重要。 尽管在当前设置中无法达到这一条件，但所提出的技巧可以利用当前最先进的设备实现，特别适合原子芯片实验。 我们预计该技术将在量子增强干涉测量中有应用。 显示英文摘要

摘要： We propose a novel and robust technique to realize a beam splitter for trapped Bose-Einstein condensates (BECs). The scheme relies on the possibility of producing different potentials simultaneously for two internal atomic states. The atoms are coherently transferred, via a Rabi coupling between the two long-lived internal states, from a single well potential to a double-well. We present numerical simulations supporting our proposal and confirming excellent efficiency and fidelity of the transfer process with realistic numbers for a BEC of $^{87}$Rb. We discuss the experimental implementation by suggesting state-selective microwave potentials as an ideal tool to be exploited for magnetically trapped atoms. The working principles of this technique are tested on our atom chip device which features an integrated coplanar micro-wave guide. In particular, the first realization of a double-well potential by using a microwave dressing field is reported. Experimental results are presented together with numerical simulations, showing good agreement. Simultaneous and independent control on the external potentials is also demonstrated in the two Rubidium clock states. The transfer between the two states, featuring respectively a single and a double-well, is characterized and it is used to measure the energy spectrum of the atoms in the double-well. Our results show that the spatial overlap between the two states is crucial to ensure the functioning of the beamsplitter. Even though this condition could not be achieve in our current setup, the proposed technique can be realized with current state-of-the-art devices being particularly well suited for atom chip experiments. We anticipate applications in quantum enhanced interferometry.