D'Onofrio Marissa, Xie Yuanheng, Rasmusson A J, Wolanski Evangeline, Cui Jiafeng, Richerme Philip
Indiana University Department of Physics, Bloomington, Indiana 47405, USA and Indiana University Quantum Science and Engineering Center, Bloomington, Indiana 47405, USA.
Phys Rev Lett. 2021 Jul 9;127(2):020503. doi: 10.1103/PhysRevLett.127.020503.
We experimentally study two-dimensional (2D) Coulomb crystals in the "radial-2D" phase of a linear Paul trap. This phase is identified by a 2D ion lattice aligned entirely with the radial plane and is created by imposing a large ratio of axial to radial trapping potentials. Using arrays of up to 19 ^{171}Yb^{+} ions, we demonstrate that the structural phase boundaries of such crystals are well described by the pseudopotential approximation, despite the time-dependent ion positions driven by intrinsic micromotion. We further observe that micromotion-induced heating of the radial-2D crystal is confined to the radial plane. Finally, we verify that the transverse motional modes, which are used in most ion-trap quantum simulation schemes, are well-predictable numerically and remain decoupled and cold in this geometry. Our results establish radial-2D ion crystals as a robust experimental platform for realizing a variety of theoretical proposals in quantum simulation and computation.
我们对线形保罗阱“径向二维”相中的二维（2D）库仑晶体进行了实验研究。该相由完全与径向平面对齐的二维离子晶格确定，通过施加较大的轴向与径向俘获势之比来产生。使用多达19个(^{171}Yb^{+})离子阵列，我们证明了尽管存在由固有微运动驱动的随时间变化的离子位置，但这种晶体的结构相边界仍能很好地用赝势近似来描述。我们进一步观察到，径向二维晶体的微运动诱导加热局限于径向平面。最后，我们验证了在大多数离子阱量子模拟方案中使用的横向运动模式在数值上是可很好预测的，并且在这种几何结构中保持解耦和低温。我们的结果将径向二维离子晶体确立为一个强大的实验平台，可用于实现量子模拟和计算中的各种理论方案。
