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Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
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使用高效的复合脉冲序列,快速,高保真地址单量子比特门
A D Leu1, M F Gely1, M A Weber1
1Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Physical review letters
|October 6, 2023
概括
我们展示了高保真性,快速的单量子位和多量子位门,使用微波控制 ^{43}Ca^{+} 原子钟量子位. 这种方法实现了较低的错误率,显示了可扩展量子计算架构的希望.
科学领域:
- 量子计算是一种量子计算.
- 原子物理 原子物理
- 量子控制是一种量子控制.
背景情况:
- 高保真度量子运算对于构建可扩展的量子计算机至关重要.
- ^{43}Ca^{+}超细量子比特为原子钟应用和量子信息处理提供了潜力.
- 在多量子比特系统中控制单个量子比特带来了重大挑战.
研究的目的:
- 为了实现高速,高保真地址的单量子比特和多量子比特门.
- 在表面陷中对43Ca^{+}量子位的门忠度和错误率进行基准测试.
- 调查量子寄存器微波控制的可扩展性.
主要方法:
- 使用电子微波控制来解决单量子比特门.
- 采用空间微波场梯度来独立控制相邻的两个量子位.
- 实施了一种高效的四脉冲方案,用于两量子比特操作.
- 执行并行随机基准测试以量化网关错误.
主要成果:
- 通过使用600 ns π/2脉冲,实现了单量子比特Clifford gate误差率为1.5×10^{-6}.
- 证明了独立的两个量子比特地址网关,平均错误率为3.4×10^{-5}每位址 π/2 网关.
- 展示了控制5微米距离的量子比特的可行性.
结论:
- 微波控制为运行 ^{43}Ca^{+} 原子钟量子比特提供了一种快速和高可靠的方法.
- 展示的空间定位技术可扩展到单个注册表中的更大数量的量子位.
- 这项工作有助于开发强大的量子计算架构.
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