用多体Ramsey动力学研究Rydberg-dressed相互作用
Accessing Rydberg-dressed interactions using many-body Ramsey dynamics
摘要：
我们证明，拉姆齐光谱可以用来观察里德伯装扮的相互作用。与许多先前的建议相反，我们的方案在实验测量的寿命内舒适地运行，并访问量子叠加至关重要的制度。关键的想法是建立一个自旋1/2从一个水平，这是里德堡打扮和另一个不是。这些能级可以是超精细或长寿命的电子态。一个伊辛自旋模型支配的拉姆齐动力学，我们推导出一个精确的解决方案。由于里德伯相互作用的结构，动力学显着不同于其他自旋系统。作为一个示例，自旋回波可以增加相干性衰减的速率。结果也适用于裸（未穿衣）里德伯态作为一种特殊情况下，我们定量再现最近的超快实验没有拟合。
英文摘要：
We demonstrate that Ramsey spectroscopy can be used to observe Rydberg-dressed interactions. In contrast to many prior proposals, our scheme operates comfortably within experimentally measured lifetimes, and accesses a regime where quantum superpositions are crucial. The key idea is to build a spin-1/2 from one level that is Rydberg-dressed and another that is not. These levels may be hyperfine or long-lived electronic states. An Ising spin model governs the Ramsey dynamics, for which we derive an exact solution. Due to the structure of Rydberg interactions, the dynamics differs significantly from that in other spin systems. As one example, spin echo can increase the rate at which coherence decays. The results also apply to bare (undressed) Rydberg states as a special case, for which we quantitatively reproduce recent ultrafast experiments without fitting.
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