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Updated: Jun 23, 2025

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基于辅助能量水平的流量子的有效初始化
Tenghui Wang1, Feng Wu1, Fei Wang1
1DAMO Quantum Laboratory, <a href="https://ror.org/00k642b80">Alibaba Group</a>, Hangzhou, Zhejiang 311121, China.
Physical review letters
|June 21, 2024
概括
我们开发了一种新的,快速的,高保真度的量子比特初始化技术,用于fluxonium量子比特. 这种方法在使用单调驱动时在300 ns内实现了超过99%的保真度,提高了量子计算准备度.
科学领域:
- 量子计算是一种量子计算.
- 量子信息科学 量子信息科学
- 电路 量子电动力学 量子电动力学
背景情况:
- 快速和高保真度的量子比特初始化对于量子算法和错误纠正至关重要.
- 对于像fluxonium这样的低频量子比特,传统的初始化方法需要复杂的多色调或强烈的驱动,这是由于对等对称性约束.
研究的目的:
- 开发一种更有效,更强大的量子比特初始化方法,用于fluxonium量子比特.
- 为了克服标准侧带冷却技术中的多光子过程的局限性.
主要方法:
- 利用 fluxonium 量子位的流量可调性来打破流量对称性.
- 启用了非计算量子位过渡和空腔激发之间的相互作用.
- 使用单调侧带驱动用于量子位初始化.
主要成果:
- 在300 ns内实现了超过99%的量子位初始化保真度.
- 证明了对控制参数变化的稳定性.
- 展示了第二次兴奋的州人口的同时移除.
结论:
- 拟议的单调侧带驱动方案在fluxonium量子位初始化方面取得了重大进展.
- 这种技术强大,高效,并且与大型量子处理器兼容.
- 它简化了初始化协议,为更复杂的量子计算铺平了道路.
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