arXiv quant-ph/04111022004-11quant-ph

用于捕获离子快速分离的电极阵列

Electrode Configurations for Fast Separation of Trapped Ions

J. P. Home, A. M. Steane

备注：: 37 pages, 19 figures. New version clarified, conclusions updated, and new sections on micromotion, example trap, manufacturing imprecision, plus some further general information
发表信息：: Quantum Information and Computation, Vol. 6, No 4&5 (2006) 289-325

摘要：

我们研究的问题，设计电极结构，使对离子被带到一起，并迅速在线性保罗陷阱阵列分离。我们表明，这是可取的电极结构，以产生一个直流八极矩与交流。径向四极对于电击穿限制可以施加的电压的情况下，我们表明，八极比四极更苛刻的结构的特征距离尺度大于1至10微米（典型的材料）时。我们提出了各种方法和优化的结构组成的一至三层的电极。三层结构允许在从陷阱中心到最近的电极表面的给定距离r处的最快操作，但是当结构的总厚度w受到约束时，导致w < r，则两层结构可能是优选的。

英文摘要：

We study the problem of designing electrode structures that allow pairs of ions to be brought together and separated rapidly in an array of linear Paul traps. We show that it is desirable for the electrode structure to produce a d.c. octupole moment with an a.c. radial quadrupole. For the case where electrical breakdown limits the voltages that can be applied, we show that the octupole is more demanding than the quadrupole when the characteristic distance scale of the structure is larger than 1 to 10 microns (for typical materials). We present a variety of approaches and optimizations of structures consisting of one to three layers of electrodes. The three-layer structures allow the fastest operation at given distance r from the trap centres to the nearest electrode surface, but when the total thickness w of the structure is constrained, leading to w < r, then two-layer structures may be preferable.

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英文摘要：

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