基于克利福德群和单个魔法门的力量的Qudit影子估计
Chengsi Mao1, Changhao Yi1, Huangjun Zhu1
1Fudan University, Fudan University, State Key Laboratory of Surface Physics, Department of Physics, and Center for Field Theory and Particle Physics, Shanghai 200433, China; Institute for Nanoelectronic Devices and Quantum Computing, Shanghai 200433, China and Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
Physical review letters
|May 9, 2025
概括
我们澄清了奇数质量维度的qudit影子估计样本复杂性. 一个单独的魔法门消除了头部,用量子比特影子估计来弥合差距.
科学领域:
- 量子信息科学 量子信息科学
- 量子计算是一种量子计算.
背景情况:
- 影子估计是一种通过随机测量来学习量子系统属性的样本有效协议.
- 与量子比特 (双层系统) 阴影估计相比,对量子比特 (多层量子系统) 阴影估计的理解是有限的.
研究的目的:
- 为了澄清qudit影子估计的样本复杂性,使用Clifford组对奇数素数局部维度进行估计.
- 提出一种方法来提高量子阴影估计的效率.
主要方法:
- 基于克利福德群的qudit影子估计样本复杂性的分析.
- 引入一个带有魔法门的电路,以提高估计效率.
主要成果:
- 据证实,qudit阴影的上空估计是O (d),独立于qudit (n) 的数量,其中d是局部维度.
- 稳定器状态可以偏离3的设计.
- 一个单一的魔法门就足以消除O(d) 的开销.
结论:
- 库迪特影子估计比以前想象的要高效,可以管理的开销.
- 使用魔法门的拟议方法显著提高了效率,匹配量子比特影子估计性能.
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