5 Physikalisches Institut, Universität Stuttgart, Stuttgart, Germany.
Phys Rev Lett. 2012 Mar 16;108(11):113001. doi: 10.1103/PhysRevLett.108.113001. Epub 2012 Mar 14.
We report on experiments exploring Stark-tuned Förster resonances between Rydberg atoms with high resolution in the Förster defect. The individual resonances are expected to exhibit different angular dependencies, opening the possibility to tune not only the interaction strength but also the angular dependence of the pair state potentials by an external electric field. We achieve a high resolution by optical Ramsey interferometry for Rydberg atoms combined with electric field pulses. The resonances are detected by a loss of visibility in the Ramsey fringes due to resonances in the interaction. We present measurements of the density dependence as well as of the coherence time at and close to Förster resonances.
我们报告了在福斯特缺陷中用高分辨率探索斯塔克调谐里德伯原子之间福斯特共振的实验。预计各个共振将表现出不同的角度依赖性，从而不仅有可能通过外电场调谐相互作用强度，还有可能调谐对态势的角度依赖性。我们通过结合电场脉冲的里德堡原子的光学拉姆齐干涉实现了高分辨率。共振通过相互作用中的共振导致拉姆齐条纹的可见度降低来检测。我们展示了福斯特共振处和附近的密度依赖性以及相干时间的测量结果。
