从模拟量子模拟器中的新兴状态设计中影子断层扫描
Max McGinley1,2, Michele Fava1,3
1Rudolf Peierls Centre for Theoretical Physics, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
Physical review letters
|November 5, 2023
概括
这项研究介绍了一种使用全球控制和先纠的新量子态断层扫描方法. 它有效地推断量子状态属性,包括非线性函数,适用于模拟量子模拟器.
科学领域:
- 量子信息科学 量子信息科学
- 量子多体物理学 量子多体物理学
背景情况:
- 量子状态断层扫描对于描述量子系统至关重要.
- 现有的方法往往需要复杂的量子位选择性操作.
研究的目的:
- 开发一种使用全球控制的新型量子态断层扫描协议.
- 为了能够有效地推断线性和非线性量子状态属性.
主要方法:
- 通过全球单元进化,将目标量子状态与ancillas纠在一起.
- 在ancillas上进行投射测量.
- 利用新兴的量子状态设计现象用于财产重建.
主要成果:
- 建立了测量统计和量子状态属性之间的通用关系.
- 该方法重建任意可观测的效率与经典影子断层扫描相提并论.
- 该协议可以与全球哈密尔顿演化实现,避免量子比特选择性门.
结论:
- 这种全球控制方法简化了量子状态断层扫描.
- 对于类似量子模拟器 (如超冷原子和赖德伯格原子阵列) 尤其有利.
- 该方法有助于描述复杂的量子状态和非线性函数.
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