射频阱中小离子库仑晶体三维长程序的观测
Observation of Three-dimensional Long-range Order in Smaller Ion Coulomb Crystals in an rf Trap
摘要：
当离子数超过约1000个时，在线性rf Paul阱中的^{40}Ca^+离子的较小且近球对称的库仑晶体中观察到了三维长程有序结构。这一结果是出乎意料的基态分子动力学（MD）模拟，但发现与亚稳离子配置的MD模拟一致。在此之前，三维长程有序结构仅在约50，000个或更多离子的潘宁陷阱中被报道。
英文摘要：
Three-dimensional long-range ordered structures in smaller and near-spherically symmetric Coulomb crystals of ^{40}Ca^+ ions confined in a linear rf Paul trap have been observed when the number of ions exceeds ~1000 ions. This result is unexpected from ground state molecular dynamics (MD) simulations, but found to be in agreement with MD simulations of metastable ion configurations. Previously, three-dimensional long-range ordered structures have only been reported in Penning traps in systems of ~50,000 ions or more.
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