使用平价保护转换器进行高保真度参数光束分割
Yao Lu1,2, Aniket Maiti3,4, John W O Garmon5,6
1Departments of Applied Physics and Physics, Yale University, New Haven, 06511, CT, USA. physics.lu@yale.edu.
Nature communications
|September 18, 2023
概括
研究人员使用新型非线性转换器开发了用于超导电路的快速,高保真量子运算. 这种方法抑制了非连贯性,实现了超过99.98%的光束分裂器门忠实度,推进了量子计算和模拟.
科学领域:
- 量子信息科学 量子信息科学
- 超导电路中的超导电路
- 量子计算和仿真是量子计算和仿真的一种方式.
背景情况:
- 微波共振器之间的快速,高保真操作对于玻色子量子计算和模拟至关重要.
- 通过非线性转换器和参数过程合共振器是一种有前途的方法.
- 由于寄生过程和脱凝,实现速度和保真都具有挑战性.
研究的目的:
- 展示一种在超导电路中实现快速和高保真运行的方法.
- 为了抑制不必要的非线性相互作用,并防止转换器诱导的脱凝.
- 为了设计一个高度连贯的beamsplitter和微波腔之间的快速交换.
主要方法:
- 使用差分驱动的DC-SQUID作为非线性转换器,与两个高Q微波腔相合.
- 利用转换器哈密尔顿的内置对称性来抑制不需要的非线性相互作用.
- 精心管理的驱动频率和环境噪声频谱.
- 描述了空洞的联合单光子子空间中的光束分裂器.
- 检测和选择后的光子损失事件.
主要成果:
- 设计了一种高度连贯的光束分割器和快速 (~100 ns) 腔位交换.
- 操作主要受到空洞内在单光子损失的限制.
- 通过后选择,实现了超过99.98%的光束分割门保真率.
结论:
- 杆转换器的哈密尔顿对称性是有效的防止转换器诱导的脱凝.
- 演示的方法显著超过当前最先进的beamsplitter门保真度.
- 这项工作为超导电路中的强大和高效的量子运算提供了途径.
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