Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden.
Institut für Experimentalphysik, Universität Innsbruck, AT-6020 Innsbruck, Austria.
Phys Rev Lett. 2019 Oct 11;123(15):153602. doi: 10.1103/PhysRevLett.123.153602.
Usually the influence of the quadratic Stark effect on an ion's trapping potential is minuscule and only needs to be considered in atomic clock experiments. In this work we excite a trapped ion to a Rydberg state with polarizability ∼8 orders of magnitude higher than a low-lying electronic state; we find that the highly polarizable ion experiences a vastly different trapping potential owing to the Stark effect. We observe changes in trap stiffness, equilibrium position, and minimum potential, which can be tuned using the trapping electric fields. These effects lie at the heart of several proposed studies, including a high-fidelity submicrosecond entangling operation; in addition we demonstrate these effects may be used to minimize ion micromotion. Mitigation of Stark effects is important for coherent control of Rydberg ions; we illustrate this by carrying out the first Rabi oscillations between a low-lying electronic state and a Rydberg state of an ion.
通常情况下，二次斯塔克效应对于离子的束缚势的影响微乎其微，只需要在原子钟实验中考虑。在这项工作中，我们将一个被捕获的离子激发到一个极化率比低能态高 8 个数量级的里德堡态；我们发现，由于斯塔克效应，高极化率的离子经历了一个完全不同的束缚势。我们观察到了阱刚度、平衡位置和最小势的变化，这些可以通过束缚电场来调节。这些效应是几项拟议研究的核心，包括高保真度的亚微秒纠缠操作；此外，我们还证明这些效应可用于最小化离子微运动。斯塔克效应的缓解对于里德堡离子的相干控制非常重要；我们通过在一个低能态和一个离子的里德堡态之间进行第一次拉比振荡来说明这一点。
