High fidelity single qubit operations using pulsed electron paramagnetic resonance.
High fidelity single qubit operations using pulsed electron paramagnetic resonance.
复制标题
使用脉冲电子顺磁共振进行高保真单量子位操作。
DOI：
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发表时间：
2005
影响因子：
8.6
通讯作者：
G. Briggs
中科院分区：
文献类型：
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作者：
J. Morton;A. Tyryshkin;A. Ardavan;Kyriakos Porfyrakis;S. Lyon;G. Briggs
使用简单射频脉冲的自旋操作中的系统误差严重限制了脉冲磁共振方法在量子计算应用中的实用性。特别是，在电子自旋量子比特上执行的量子逻辑运算的保真度远远低于量子算法应用的阈值。使用三种独立的技术，我们演示了使用复合脉冲将保真度提高几个数量级。观察到的高保真操作受到脉冲相位误差的限制，但仍然落在应用量子误差校正所需的范围内。
Systematic errors in spin rotation operations using simple rf pulses place severe limitations on the usefulness of the pulsed magnetic resonance methods in quantum computing applications. In particular, the fidelity of quantum logic operations performed on electron spin qubits falls well below the threshold for the application of quantum algorithms. Using three independent techniques, we demonstrate the use of composite pulses to improve this fidelity by several orders of magnitude. The observed high-fidelity operations are limited by pulse phase errors, but nevertheless fall within the limits required for the application of quantum error correction.