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arXiv 1606.08409quant-ph
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使用近场微波的高保真捕获离子量子逻辑

High-fidelity trapped-ion quantum logic using near-field microwaves

T. P. Harty, M. A. Sepiol, D. T. C. Allcock, C. J. Ballance, J. E. Tarlton, D. M. Lucas

摘要:

我们在一个室温微制造离子阱中演示了一个由近场微波驱动的双量子位逻辑门。我们测量的门保真度为99.7(1)\%,这高于容错量子计算所需的最低阈值。使用由陷阱电极产生的微波磁场梯度,将门直接应用于$^{43}$ Ca $^+$“原子钟“量子比特(相干时间$T_2^*\approx 50\,\mathrm{s}$)。我们介绍了一种动态解耦门方法,它稳定了量子比特对波动的交流。塞曼位移,避免了需要零微波场。

英文摘要:

We demonstrate a two-qubit logic gate driven by near-field microwaves in a room-temperature microfabricated ion trap. We measure a gate fidelity of 99.7(1)\%, which is above the minimum threshold required for fault-tolerant quantum computing. The gate is applied directly to $^{43}$Ca$^+$ "atomic clock" qubits (coherence time $T_2^*\approx 50\,\mathrm{s}$) using the microwave magnetic field gradient produced by a trap electrode. We introduce a dynamically-decoupled gate method, which stabilizes the qubits against fluctuating a.c.\ Zeeman shifts and avoids the need to null the microwave field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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