控制Z门的本地方法在诱导合的流量子位中
Xizheng Ma1, Gengyan Zhang1, Feng Wu1
1DAMO Quantum Laboratory, Alibaba Group, Hangzhou, Zhejiang 311121, China.
Physical review letters
|February 23, 2024
概括
量子比特提供电荷保护,但相互作用有限. 这项研究引入了用于多功能流量子位相互作用的感应合,实现了高保真性纠和20 ns控制的Z门.
科学领域:
- 量子信息科学 量子信息科学
- 超导量子计算 超导量子计算
- 量子错误纠正方法 量子错误纠正方法
背景情况:
- 流量子比特是量子计算的一个有希望的平台,因为它们对电荷噪声的强度很高.
- 流量子比特的电容合主要使XX相互作用成为可能,限制了其他基本门类型的实现.
- 之前在流量子位中实现ZZ或XZ相互作用的方法是复杂的,涉及更高的能量状态或微波驱动.
研究的目的:
- 为流量子位提出并演示一种新的感应合方案.
- 为了实现XX以外的更广泛的本地量子比特-量子比特相互作用,特别是ZZ相互作用.
- 为了实现基于流的量子处理器的高保真度量子门和纠.
主要方法:
- 实施了感应合方案,以促进直接的量子比特-量子比特相互作用.
- 使用内置的,流量控制的可调 ZZ 交互用于纠操作.
- 采用连续动态解技术,用于对流量噪声进行噪声过.
主要成果:
- 演示了一个20纳秒控制的Z门,高平均保真率为99.53%.
- 通过提出的感应合和流量控制的ZZ相互作用,成功执行了量子位纠.
- 在流系统中确定了一个独特的参数空间,适用于高效的门操作.
结论:
- 感应合方案显著扩大了流量子位的本机交互能力.
- 经过证明的高保真性控制Z门验证了拟议的感应合和噪声过技术的有效性.
- 这项工作突出了通过优化量子位合和门设计来推进基于流的量子计算的有希望的途径.
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